用Java实现JVM第八章《数组和字符串》

案例介绍
本章主要介绍如何实现让虚拟机处理数组和字符串,在虚拟机功能增强后,我们可以执行数组类型计算和输出字符串。本章需要新增实现数组指令;newarray、anewarray、arraylength、aload、astore、multianewarray、ldc,同时需要需要开发字符串池方法等。

数组在Java虚拟机中是给比较特殊的概念,主要有以下原因;

首先,数组类和普通的类是不同的。普通的类从class文件中加载,但是数组类由Java虚拟机在运行时生成。数组的类名是左括号([)+数组元素的类型描述符;数组的类型描述符就是类名本身。例如,int[]的类名是[I,int[][]的类名是[[I,Object[]的类名是[Ljava/lang/Object;,String[][]的类名是[[java/lang/String;,等等。

其次,创建数组的方式和创建普通对象的方式不同。普通对象new指令创建,然后由构造函数初始化。基本类型数组由newarray指令创建;引用类型数组由anewarray指令创建;另外还有一个专门的mulitianewarray指令用于创建多维数组。

最后,很显然,数组和普通对象存在的数据也是不同的。普通对象中存放的是实例变量,通过putfield和getfield指令存取。数组对象中存放的则是数组元素,通过aload和astore系列指令按索引存取。其中可以是a、b、c、d、f、i、l或者s,分别用于存取引用、byte、char、double、float、int、long或者shore类型的数组。另外,还有一个arraylength指令,用于获取数组长度。

环境准备
1、jdk 1.8.0
2、IntelliJ IDEA Community Edition 2018.3.1 x64

配置信息
1、调试配置
2.1、配置位置:Run/Debug Configurations -> program arguments
2.2、配置内容(执行数组计算):-Xjre “C:\Program Files\Java\jdk1.8.0_161\jre” E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\BubbleSortTest
2.2、配置内容(字符串的输出):-Xjre “C:\Program Files\Java\jdk1.8.0_161\jre” E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\HelloWorld -verbose true -args 你好,java版虚拟机v1.0,欢迎你的到来。

代码示例

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itstack-demo-jvm-08
├── pom.xml
└── src
└── main
│ └── java
│ └── org.itstack.demo.jvm
│ ├── classfile
│ │ ├── attributes {BootstrapMethods/Code/ConstantValue...}
│ │ ├── constantpool {CONSTANT_TAG_CLASS/CONSTANT_TAG_FIELDREF/CONSTANT_TAG_METHODREF...}
│ │ ├── ClassFile.java
│ │ ├── ClassReader.java
│ │ └── MemberInfo.java
│ ├── classpath
│ │ ├── impl
│ │ │ ├── CompositeEntry.java
│ │ │ ├── DirEntry.java
│ │ │ ├── WildcardEntry.java
│ │ │ └── ZipEntry.java
│ │ ├── Classpath.java
│ │ └── Entry.java
│ ├── classpath
│ │ ├── base
│ │ │ ├── BytecodeReader.java
│ │ │ ├── ClassInitLogic.java
│ │ │ ├── Instruction.java
│ │ │ ├── InstructionBranch.java
│ │ │ ├── InstructionIndex8.java
│ │ │ ├── InstructionIndex16.java
│ │ │ ├── InstructionNoOperands.java
│ │ │ └── MethodInvokeLogic.java
│ │ ├── comparisons
│ │ ├── constants
│ │ ├── control
│ │ ├── conversions
│ │ ├── extended
│ │ ├── loads
│ │ ├── math
│ │ ├── references
│ │ │ ├── ANEW_ARRAY.java
│ │ │ ├── ARRAY_LENGTH.java
│ │ │ ├── CHECK_CAST.java
│ │ │ ├── GET_FIELD.java
│ │ │ ├── GET_STATIC.java
│ │ │ ├── INSTANCE_OF.java
│ │ │ ├── INVOKE_INTERFACE.java
│ │ │ ├── INVOKE_SPECIAL.java
│ │ │ ├── INVOKE_STATIC.java
│ │ │ ├── INVOKE_VIRTUAL.java
│ │ │ ├── MULTI_ANEW_ARRAY.java
│ │ │ ├── NEW.java
│ │ │ ├── NEW_ARRAY.java
│ │ │ ├── PUT_FIELD.java
│ │ │ └── PUT_STATIC.java
│ │ ├── stack
│ │ ├── store
│ │ │ └── xastore
│ │ │ ├── AASTORE.java
│ │ │ ├── BASTORE.java
│ │ │ ├── CASTORE.java
│ │ │ ├── DASTORE.java
│ │ │ ├── FASTORE.java
│ │ │ ├── IASTORE.java
│ │ │ ├── LASTORE.java
│ │ │ └── SASTORE.java
│ │ └── Factory
│ ├── rtda
│ │ ├── heap
│ │ │ ├── constantpool
│ │ │ ├── methodarea
│ │ │ │ ├── Class.java
│ │ │ │ ├── ClassMember.java
│ │ │ │ ├── Field.java
│ │ │ │ ├── Method.java
│ │ │ │ ├── MethodDescriptor.java
│ │ │ │ ├── MethodDescriptorParser.java
│ │ │ │ ├── MethodLookup.java
│ │ │ │ ├── Object.java
│ │ │ │ ├── Slots.java
│ │ │ │ └── StringPool.java
│ │ │ └── ClassLoader.java
│ │ ├── Frame.java
│ │ ├── JvmStack.java
│ │ ├── LocalVars.java
│ │ ├── OperandStack.java
│ │ ├── Slot.java
│ │ └── Thread.java
│ ├── Cmd.java
│ ├── Interpret.java
│ └── Main.java
└── test
└── java
└── org.itstack.demo.test
├── BubbleSortTest.java
└── HelloWorld.java

代码片段

ANEW_ARRAY.java

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package org.itstack.demo.jvm.instructions.references;

import org.itstack.demo.jvm.instructions.base.InstructionIndex16;
import org.itstack.demo.jvm.rtda.Frame;
import org.itstack.demo.jvm.rtda.OperandStack;
import org.itstack.demo.jvm.rtda.heap.constantpool.ClassRef;
import org.itstack.demo.jvm.rtda.heap.constantpool.RunTimeConstantPool;
import org.itstack.demo.jvm.rtda.heap.methodarea.Class;
import org.itstack.demo.jvm.rtda.heap.methodarea.Object;

/**
* http://www.itstack.org
* create by fuzhengwei on 2019/4/29
* create new array of reference
*/
public class ANEW_ARRAY extends InstructionIndex16 {

@Override
public void execute(Frame frame) {

RunTimeConstantPool runTimeConstantPool = frame.method().clazz().constantPool();
ClassRef classRef = (ClassRef) runTimeConstantPool.getConstants(this.idx);
Class componentClass = classRef.resolvedClass();

OperandStack stack = frame.operandStack();
int count = stack.popInt();
if (count < 0) {
throw new NegativeArraySizeException();
}

Class arrClass = componentClass.arrayClass();
Object arr = arrClass.newArray(count);
stack.pushRef(arr);

}

}

ARRAY_LENGTH.java

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package org.itstack.demo.jvm.instructions.references;

import org.itstack.demo.jvm.instructions.base.InstructionNoOperands;
import org.itstack.demo.jvm.rtda.Frame;
import org.itstack.demo.jvm.rtda.OperandStack;
import org.itstack.demo.jvm.rtda.heap.methodarea.Object;

/**
* http://www.itstack.org
* create by fuzhengwei on 2019/4/29
* get length of array
*/
public class ARRAY_LENGTH extends InstructionNoOperands {

@Override
public void execute(Frame frame) {

OperandStack stack = frame.operandStack();
Object arrRef = stack.popRef();
if (null == arrRef){
throw new NullPointerException();
}

int arrLen = arrRef.arrayLength();
stack.pushInt(arrLen);
}

}

NEW_ARRAY.java

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package org.itstack.demo.jvm.instructions.references;

import org.itstack.demo.jvm.instructions.base.BytecodeReader;
import org.itstack.demo.jvm.instructions.base.Instruction;
import org.itstack.demo.jvm.rtda.Frame;
import org.itstack.demo.jvm.rtda.OperandStack;
import org.itstack.demo.jvm.rtda.heap.ClassLoader;
import org.itstack.demo.jvm.rtda.heap.methodarea.Class;
import org.itstack.demo.jvm.rtda.heap.methodarea.Object;

/**
* http://www.itstack.org
* create by fuzhengwei on 2019/4/29
*/
public class NEW_ARRAY implements Instruction {

private byte atype;

@Override
public void fetchOperands(BytecodeReader reader) {
this.atype = reader.readByte();
}

@Override
public void execute(Frame frame) {
OperandStack stack = frame.operandStack();
int count = stack.popInt();
if (count < 0) {
throw new NegativeArraySizeException();
}

ClassLoader classLoader = frame.method().clazz().loader();
Class arrClass = getPrimitiveArrayClass(classLoader, this.atype);
Object arr = arrClass.newArray(count);
stack.pushRef(arr);

}

private Class getPrimitiveArrayClass(ClassLoader loader, byte atype){
switch (atype) {
case ArrayType.AT_BOOLEAN:
return loader.loadClass("[Z");
case ArrayType.AT_BYTE:
return loader.loadClass("[B");
case ArrayType.AT_CHAR:
return loader.loadClass("[C");
case ArrayType.AT_SHORT:
return loader.loadClass("[S");
case ArrayType.AT_INT:
return loader.loadClass("[I");
case ArrayType.AT_LONG:
return loader.loadClass("[J");
case ArrayType.AT_FLOAT:
return loader.loadClass("[F");
case ArrayType.AT_DOUBLE:
return loader.loadClass("[D");
default:
throw new RuntimeException("Invalid atype!");
}
}

static class ArrayType {
static final byte AT_BOOLEAN = 4;
static final byte AT_CHAR = 5;
static final byte AT_FLOAT = 6;
static final byte AT_DOUBLE = 7;
static final byte AT_BYTE = 8;
static final byte AT_SHORT = 9;
static final byte AT_INT = 10;
static final byte AT_LONG = 11;
}

}

IASTORE.java

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package org.itstack.demo.jvm.instructions.stores.xastore;

import org.itstack.demo.jvm.instructions.base.InstructionNoOperands;
import org.itstack.demo.jvm.rtda.Frame;
import org.itstack.demo.jvm.rtda.OperandStack;
import org.itstack.demo.jvm.rtda.heap.methodarea.Object;

/**
* http://www.itstack.org
* create by fuzhengwei on 2019/4/29
*/
public class IASTORE extends InstructionNoOperands {

@Override
public void execute(Frame frame) {
OperandStack stack = frame.operandStack();
int val = stack.popInt();
int idx = stack.popInt();
Object arrRef = stack.popRef();

checkNotNull(arrRef);
int[] ints = arrRef.ints();
checkIndex(ints.length, idx);
ints[idx] = val;

}

}

StringPool.java

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package org.itstack.demo.jvm.rtda.heap.methodarea;

import org.itstack.demo.jvm.rtda.heap.ClassLoader;

import java.util.HashMap;
import java.util.Map;

/**
* http://www.itstack.org
* create by fuzhengwei on 2019/4/29
*/
public class StringPool {

private static Map<String, Object> internedStrs = new HashMap<>();

public static Object jString(ClassLoader loader, String goStr) {
Object internedStr = internedStrs.get(goStr);
if (null != internedStr) return internedStr;

char[] chars = goStr.toCharArray();
Object jChars = new Object(loader.loadClass("[C"), chars);

Object jStr = loader.loadClass("java/lang/String").newObject();
jStr.setRefVal("value", "[C", jChars);

internedStrs.put(goStr, jStr);
return jStr;
}

public static String goString(Object jStr) {
Object charArr = jStr.getRefVar("value", "[C");
return new String(charArr.chars());
}

}

Interpret.java

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package org.itstack.demo.jvm;

import com.alibaba.fastjson.JSON;
import org.itstack.demo.jvm.instructions.Factory;
import org.itstack.demo.jvm.instructions.base.BytecodeReader;
import org.itstack.demo.jvm.instructions.base.Instruction;
import org.itstack.demo.jvm.rtda.Frame;
import org.itstack.demo.jvm.rtda.Thread;
import org.itstack.demo.jvm.rtda.heap.ClassLoader;
import org.itstack.demo.jvm.rtda.heap.methodarea.*;
import org.itstack.demo.jvm.rtda.heap.methodarea.Class;
import org.itstack.demo.jvm.rtda.heap.methodarea.Object;


//指令集解释器
class Interpret {

Interpret(Method method, boolean logInst, String args) {
Thread thread = new Thread();
Frame frame = thread.newFrame(method);
thread.pushFrame(frame);

if (null != args){
Object jArgs = createArgsArray(method.clazz().loader(), args.split(" "));
frame.localVars().setRef(0, jArgs);
}

loop(thread, logInst);
}

private Object createArgsArray(ClassLoader loader, String[] args) {
Class stringClass = loader.loadClass("java/lang/String");
Object argsArr = stringClass.arrayClass().newArray(args.length);
Object[] jArgs = argsArr.refs();
for (int i = 0; i < jArgs.length; i++) {
jArgs[i] = StringPool.jString(loader, args[i]);
}
return argsArr;
}

private void loop(Thread thread, boolean logInst) {
BytecodeReader reader = new BytecodeReader();
while (true) {
Frame frame = thread.currentFrame();
int pc = frame.nextPC();
thread.setPC(pc);

reader.reset(frame.method().code, pc);
byte opcode = reader.readByte();
Instruction inst = Factory.newInstruction(opcode);
if (null == inst) {
System.out.println("Unsupported opcode " + byteToHexString(new byte[]{opcode}));
break;
}
inst.fetchOperands(reader);
frame.setNextPC(reader.pc());

if (logInst) {
logInstruction(frame, inst, opcode);
}

//exec
inst.execute(frame);

if (thread.isStackEmpty()) {
break;
}
}
}

private static void logInstruction(Frame frame, Instruction inst, byte opcode) {
Method method = frame.method();
String className = method.clazz().name();
String methodName = method.name();
String outStr = (className + "." + methodName + "() \t") +
"寄存器(指令):" + byteToHexString(new byte[]{opcode}) + " -> " + inst.getClass().getSimpleName() + " => 局部变量表:" + JSON.toJSONString(frame.operandStack().getSlots()) + " 操作数栈:" + JSON.toJSONString(frame.operandStack().getSlots());
System.out.println(outStr);
}

private static String byteToHexString(byte[] codes) {
StringBuilder sb = new StringBuilder();
sb.append("0x");
for (byte b : codes) {
int value = b & 0xFF;
String strHex = Integer.toHexString(value);
if (strHex.length() < 2) {
strHex = "0" + strHex;
}
sb.append(strHex);
}
return sb.toString();
}

}

BubbleSortTest.java

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package org.itstack.demo.test;

/**
* -Xjre "C:\Program Files\Java\jdk1.8.0_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\BubbleSortTest -verbose true
*/
public class BubbleSortTest {

public static void main(String[] args) {
int[] arr = {
22, 84, 77, 11, 95, 9, 78, 56,
36, 97, 65, 36, 10, 24 ,92, 48
};

//printArray(arr);
bubbleSort(arr);
//System.out.println(123456789);
printArray(arr);
}

private static void bubbleSort(int[] arr) {
boolean swapped = true;
int j = 0;
int tmp;
while (swapped) {
swapped = false;
j++;
for (int i = 0; i < arr.length - j; i++) {
if (arr[i] > arr[i + 1]) {
tmp = arr[i];
arr[i] = arr[i + 1];
arr[i + 1] = tmp;
swapped = true;
}
}
}
}

private static void printArray(int[] arr) {
for (int i : arr) {
System.out.println(i);
}
}

}

HelloWorld.java

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package org.itstack.demo.test;

/**
* -Xjre "C:\Program Files\Java\jdk1.8.0_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\HelloWorld -verbose true -args 你好,java版虚拟机v1.0,欢迎你的到来。
*/
public class HelloWorld {

public static void main(String[] args) {
for (String str : args) {
System.out.println(str);
}
}

}

测试结果一;执行数组

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-Xjre "C:\Program Files\Java\jdk1.8.0_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\BubbleSortTest -verbose true
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":0},{"num":0},{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0},{"num":0},{"num":0}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0xbc -> NEW_ARRAY => 局部变量表:[{"num":16},{"num":0},{"num":0},{"num":0}] 操作数栈:[{"num":16},{"num":0},{"num":0},{"num":0}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":0},{"num":0},{"num":0}] 操作数栈:[{"num":16,"ref":{}},{"num":0},{"num":0},{"num":0}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x03 -> ICONST_0 => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":0},{"num":22}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":0},{"num":22}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x04 -> ICONST_1 => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":22}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":22}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":1},{"num":84}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":1},{"num":84}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x05 -> ICONST_2 => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":84}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":84}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":2},{"num":77}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":2},{"num":77}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x06 -> ICONST_3 => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":77}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":77}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":3},{"num":11}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":3},{"num":11}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x07 -> ICONST_4 => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":11}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":11}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":4},{"num":95}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":4},{"num":95}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x08 -> ICONST_5 => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":95}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":95}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":5},{"num":9}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":5},{"num":9}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":9}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":9}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":6},{"num":78}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":6},{"num":78}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":78}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":78}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":7},{"num":56}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":7},{"num":56}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":56}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":56}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":8},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":8},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":9},{"num":97}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":9},{"num":97}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":97}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":97}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":10},{"num":65}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":10},{"num":65}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":65}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":65}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":11},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":11},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":36}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":36}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":12},{"num":10}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":12},{"num":10}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":10}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":10}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":13},{"num":24}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":13},{"num":24}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":24}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":24}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x59 -> DUP => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":14},{"num":92}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":14},{"num":92}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x10 -> BIPUSH => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":92}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":92}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4f -> IASTORE => 局部变量表:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":48}] 操作数栈:[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":48}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x4c -> ASTORE_1 => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0x2b -> ALOAD_1 => 局部变量表:[{"num":16},{"num":16},{"num":15},{"num":48}] 操作数栈:[{"num":16},{"num":16},{"num":15},{"num":48}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0xb8 -> INVOKE_STATIC => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}]
java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC => 局部变量表:null 操作数栈:null
java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN => 局部变量表:null 操作数栈:null
... ...
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xb2 -> GET_STATIC => 局部变量表:[{"num":9},{"num":0}] 操作数栈:[{"num":9},{"num":0}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x15 -> ILOAD => 局部变量表:[{"num":9},{"num":0}] 操作数栈:[{"num":9},{"num":0}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL => 局部变量表:[{"num":9},{"num":9}] 操作数栈:[{"num":9},{"num":9}]
9
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x84 -> IINC => 局部变量表:[{"num":9},{"num":9}] 操作数栈:[{"num":9},{"num":9}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xa7 -> GOTO => 局部变量表:[{"num":9},{"num":9}] 操作数栈:[{"num":9},{"num":9}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x1d -> ILOAD_3 => 局部变量表:[{"num":9},{"num":9}] 操作数栈:[{"num":9},{"num":9}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x1c -> ILOAD_2 => 局部变量表:[{"num":1},{"num":9}] 操作数栈:[{"num":1},{"num":9}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xa2 -> IF_ICMPGE => 局部变量表:[{"num":1},{"num":16}] 操作数栈:[{"num":1},{"num":16}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x2b -> ALOAD_1 => 局部变量表:[{"num":1},{"num":16}] 操作数栈:[{"num":1},{"num":16}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x1d -> ILOAD_3 => 局部变量表:[{"num":1,"ref":{}},{"num":16}] 操作数栈:[{"num":1,"ref":{}},{"num":16}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x2e -> IALOAD => 局部变量表:[{"num":1,"ref":{}},{"num":1}] 操作数栈:[{"num":1,"ref":{}},{"num":1}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x36 -> ISTORE => 局部变量表:[{"num":10},{"num":1}] 操作数栈:[{"num":10},{"num":1}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xb2 -> GET_STATIC => 局部变量表:[{"num":10},{"num":1}] 操作数栈:[{"num":10},{"num":1}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x15 -> ILOAD => 局部变量表:[{"num":10},{"num":1}] 操作数栈:[{"num":10},{"num":1}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL => 局部变量表:[{"num":10},{"num":10}] 操作数栈:[{"num":10},{"num":10}]
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org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x84 -> IINC => 局部变量表:[{"num":97},{"num":97}] 操作数栈:[{"num":97},{"num":97}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xa7 -> GOTO => 局部变量表:[{"num":97},{"num":97}] 操作数栈:[{"num":97},{"num":97}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x1d -> ILOAD_3 => 局部变量表:[{"num":97},{"num":97}] 操作数栈:[{"num":97},{"num":97}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0x1c -> ILOAD_2 => 局部变量表:[{"num":16},{"num":97}] 操作数栈:[{"num":16},{"num":97}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xa2 -> IF_ICMPGE => 局部变量表:[{"num":16},{"num":16}] 操作数栈:[{"num":16},{"num":16}]
org/itstack/demo/test/BubbleSortTest.printArray() 寄存器(指令):0xb1 -> RETURN => 局部变量表:[{"num":16},{"num":16}] 操作数栈:[{"num":16},{"num":16}]
org/itstack/demo/test/BubbleSortTest.main() 寄存器(指令):0xb1 -> RETURN => 局部变量表:[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}] 操作数栈:[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}]

Process finished with exit code 0

测试结果二;输出字符

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org/itstack/demo/test/HelloWorld.main() 	寄存器(指令):0x2a -> ALOAD_0 => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x4c -> ASTORE_1 => 局部变量表:[{"num":0,"ref":{}},{"num":0}] 操作数栈:[{"num":0,"ref":{}},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x2b -> ALOAD_1 => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xbe -> ARRAY_LENGTH => 局部变量表:[{"num":0,"ref":{}},{"num":0}] 操作数栈:[{"num":0,"ref":{}},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x3d -> ISTORE_2 => 局部变量表:[{"num":1},{"num":0}] 操作数栈:[{"num":1},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x03 -> ICONST_0 => 局部变量表:[{"num":1},{"num":0}] 操作数栈:[{"num":1},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x3e -> ISTORE_3 => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x1d -> ILOAD_3 => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x1c -> ILOAD_2 => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xa2 -> IF_ICMPGE => 局部变量表:[{"num":0},{"num":1}] 操作数栈:[{"num":0},{"num":1}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x2b -> ALOAD_1 => 局部变量表:[{"num":0},{"num":1}] 操作数栈:[{"num":0},{"num":1}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x1d -> ILOAD_3 => 局部变量表:[{"num":0,"ref":{}},{"num":1}] 操作数栈:[{"num":0,"ref":{}},{"num":1}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x32 -> AALOAD => 局部变量表:[{"num":0,"ref":{}},{"num":0}] 操作数栈:[{"num":0,"ref":{}},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x3a -> ASTORE => 局部变量表:[{"num":0,"ref":{}},{"num":0}] 操作数栈:[{"num":0,"ref":{}},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xb2 -> GET_STATIC => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
java/lang/Object.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC => 局部变量表:null 操作数栈:null
java/lang/Object.<clinit>() 寄存器(指令):0xb1 -> RETURN => 局部变量表:null 操作数栈:null
java/lang/System.<clinit>() 寄存器(指令):0xb8 -> INVOKE_STATIC => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0x01 -> ACONST_NULL => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0xb3 -> PUT_STATIC => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
java/lang/System.<clinit>() 寄存器(指令):0xb1 -> RETURN => 局部变量表:[{"num":0}] 操作数栈:[{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xb2 -> GET_STATIC => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x19 -> ALOAD => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xb6 -> INVOKE_VIRTUAL => 局部变量表:[{"num":0},{"num":0,"ref":{}}] 操作数栈:[{"num":0},{"num":0,"ref":{}}]

你好,java版虚拟机v1.0,欢迎你的到来。

org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x84 -> IINC => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xa7 -> GOTO => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x1d -> ILOAD_3 => 局部变量表:[{"num":0},{"num":0}] 操作数栈:[{"num":0},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0x1c -> ILOAD_2 => 局部变量表:[{"num":1},{"num":0}] 操作数栈:[{"num":1},{"num":0}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xa2 -> IF_ICMPGE => 局部变量表:[{"num":1},{"num":1}] 操作数栈:[{"num":1},{"num":1}]
org/itstack/demo/test/HelloWorld.main() 寄存器(指令):0xb1 -> RETURN => 局部变量表:[{"num":1},{"num":1}] 操作数栈:[{"num":1},{"num":1}]