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最新推荐文章于 2025-12-15 08:57:28 发布

转载最新推荐文章于 2025-12-15 08:57:28 发布 · 91 阅读

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原文链接：http://www.cnblogs.com/extjs4/p/9367051.html

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#java

package com.test19;
public class Test02 {
    public void test(){
        Integer[] m = new Integer[]{};
        m[0] += 3;
    }
}

package com.test19;
public class Test02 {
    public Test02() {   }
    public void test() {
        Integer[] m = new Integer[0];
        m[0] = Integer.valueOf(m[0].intValue() + 3);
    }
}

Classfile /C:/Test02.class
  Last modified 2018-7-25; size 492 bytes
  MD5 checksum 5497a7800c6b84a191ee203de7bd3a24
  Compiled from "Test02.java"
public class com.test19.Test02
  SourceFile: "Test02.java"
  minor version: 0
  major version: 51
  flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
   #1 = Methodref          #6.#19         //  java/lang/Object."<init>":()V
   #2 = Class              #20            //  java/lang/Integer
   #3 = Methodref          #2.#21         //  java/lang/Integer.intValue:()I
   #4 = Methodref          #2.#22         //  java/lang/Integer.valueOf:(I)Ljava/lang/Integer;
   #5 = Class              #23            //  com/test19/Test02
   #6 = Class              #24            //  java/lang/Object
   #7 = Utf8               <init>
   #8 = Utf8               ()V
   #9 = Utf8               Code
  #10 = Utf8               LineNumberTable
  #11 = Utf8               LocalVariableTable
  #12 = Utf8               this
  #13 = Utf8               Lcom/test19/Test02;
  #14 = Utf8               test
  #15 = Utf8               m
  #16 = Utf8               [Ljava/lang/Integer;
  #17 = Utf8               SourceFile
  #18 = Utf8               Test02.java
  #19 = NameAndType        #7:#8          //  "<init>":()V
  #20 = Utf8               java/lang/Integer
  #21 = NameAndType        #25:#26        //  intValue:()I
  #22 = NameAndType        #27:#28        //  valueOf:(I)Ljava/lang/Integer;
  #23 = Utf8               com/test19/Test02
  #24 = Utf8               java/lang/Object
  #25 = Utf8               intValue
  #26 = Utf8               ()I
  #27 = Utf8               valueOf
  #28 = Utf8               (I)Ljava/lang/Integer;
{
  public com.test19.Test02();
    flags: ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #1                  // Method java/lang/Object."<init>":()V
         4: return
      LineNumberTable:
        line 4: 0
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
               0       5     0  this   Lcom/test19/Test02;

  public void test();
    flags: ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=1
         0: iconst_0
         1: anewarray     #2                  // class java/lang/Integer
         4: astore_1
         5: aload_1
         6: astore_2
         7: aload_2
         8: iconst_0
         9: aload_2
        10: iconst_0
        11: aaload
        12: invokevirtual #3                  // Method java/lang/Integer.intValue:()I
        15: iconst_3
        16: iadd
        17: invokestatic  #4                  // Method java/lang/Integer.valueOf:(I)Ljava/lang/Integer;
        20: dup_x2
        21: aastore
        22: pop
        23: return
      LineNumberTable:
        line 14: 0
        line 15: 5
        line 17: 23
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
               0      24     0  this   Lcom/test19/Test02;
               5      19     1     m   [Ljava/lang/Integer;
}

转载于:https://www.cnblogs.com/extjs4/p/9367051.html