javap命令的输出
我使用javap命令的输出,java,bytecode,.class-file,javap,Java,Bytecode,.class File,Javap,我使用javap命令检查了我的类文件，我无法理解下面的部分 Classfile /D:/WaitNotifyExample.class Last modified Dec 20, 2013; size 622 bytes MD5 checksum 4781f8cf8062fa75efa30c76adc25cfb Compiled from "WaitNotifyExample.java" public class WaitNotifyExample SourceFile: "Wait
javapClassfile /D:/WaitNotifyExample.class
Last modified Dec 20, 2013; size 622 bytes
MD5 checksum 4781f8cf8062fa75efa30c76adc25cfb
Compiled from "WaitNotifyExample.java"
public class WaitNotifyExample
SourceFile: "WaitNotifyExample.java"
minor version: 0
major version: 51
flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
#1 = Methodref #12.#24 // java/lang/Object."<init>":()V
#2 = Class #25 // java/lang/String
#3 = String #26 // I am hidden
#4 = Methodref #2.#27 // java/lang/String."<init>":
(Ljava/lang/String;)V
#5 = Fieldref #11.#28 // WaitNotifyExample.s1:Ljava/lang/String;
#6 = String #29 // I am diving into Pool
#7 = Fieldref #11.#30 // WaitNotifyExample.s2:Ljava/lang/String;
#8 = Fieldref #31.#32 // java/lang/System.out:Ljava/io/PrintStream;
#9 = String #33 // hello World
#10 = Methodref #34.#35 // java/io/PrintStream.println:
(Ljava/lang/String;)V
#11 = Class #36 // WaitNotifyExample
#12 = Class #37 // java/lang/Object
#13 = Utf8 s1
#14 = Utf8 Ljava/lang/String;
#15 = Utf8 s2
#16 = Utf8 <init>
#17 = Utf8 ()V
#18 = Utf8 Code
#19 = Utf8 LineNumberTable
#20 = Utf8 main
#21 = Utf8 ([Ljava/lang/String;)V
#22 = Utf8 SourceFile
#23 = Utf8 WaitNotifyExample.java
#24 = NameAndType #16:#17 // "<init>":()V
#25 = Utf8 java/lang/String
#26 = Utf8 I am hidden
#27 = NameAndType #16:#38 // "<init>":(Ljava/lang/String;)V
#28 = NameAndType #13:#14 // s1:Ljava/lang/String;
#29 = Utf8 I am diving into Pool
#30 = NameAndType #15:#14 // s2:Ljava/lang/String;
#31 = Class #39 // java/lang/System
#32 = NameAndType #40:#41 // out:Ljava/io/PrintStream;
#33 = Utf8 hello World
#34 = Class #42 // java/io/PrintStream
#35 = NameAndType #43:#38 // println:(Ljava/lang/String;)V
#36 = Utf8 WaitNotifyExample
#37 = Utf8 java/lang/Object
#38 = Utf8 (Ljava/lang/String;)V
#39 = Utf8 java/lang/System
#40 = Utf8 out
#41 = Utf8 Ljava/io/PrintStream;
#42 = Utf8 java/io/PrintStream
#43 = Utf8 println
{
public java.lang.String s1;
flags: ACC_PUBLIC
public java.lang.String s2;
flags: ACC_PUBLIC
public WaitNotifyExample();
flags: ACC_PUBLIC
Code:
stack=4, locals=1, args_size=1
0: aload_0
1: invokespecial #1 // Method java/lang/Object."<init>":()V
4: aload_0
5: new #2 // class java/lang/String
8: dup
9: ldc #3 // String I am hidden
11: invokespecial #4 // Method java/lang/String."<init>":(Ljava/lang/String;)V
14: putfield #5 // Field s1:Ljava/lang/String;
17: aload_0
18: new #2 // class java/lang/String
21: dup
22: ldc #6 // String I am diving into Pool
24: invokespecial #4 // Method java/lang/String."<init>":(Ljava/lang/String;)V
27: putfield #7 // Field s2:Ljava/lang/String;
30: return
LineNumberTable:
line 2: 0
line 4: 4
line 5: 17
public static void main(java.lang.String[]);
flags: ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=2, args_size=1
0: iconst_0
1: istore_1
2: getstatic #8 // Field java/lang/System.out:Ljava/io/PrintStream;
5: ldc #9 // String hello World
7: invokevirtual #10 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
10: return
LineNumberTable:
line 7: 0
line 8: 2
line 9: 10
}
你没有得到的是什么？它的字节码。如果您理解字节码，那么您将很容易理解输出的含义。javap“反汇编”代码，而不是反编译代码。这意味着您有一个WaitNOtifyExample构造函数、一个main方法和两个公共字符串引用。在这些方法和构造函数定义中，遵循这些方法和构造函数的字节码，它描述了这两个项正在做什么（以字节码表示）。您没有得到的是什么？它的字节码。如果您理解字节码，那么您将很容易理解输出的含义。javap“反汇编”代码，而不是反编译代码。这意味着您有一个WaitNOtifyExample构造函数、一个main方法和两个公共字符串引用。在这些方法和构造函数中，定义遵循这些方法和构造函数的字节码，它描述了这两个项在做什么（字节码）
表示执行方法所需的堆栈深度Stack
指的是它接受多少个参数arg_size
表示需要在局部变量表中保留多少局部变量插槽locals
LineNumberTable: section
表示执行方法所需的堆栈深度Stack
指的是它接受多少个参数arg_size
表示需要在局部变量表中保留多少局部变量插槽locals
LineNumberTable: section
LineNumberTable是保存元数据以进行调试的可选属性之一。在这种情况下，它指定字节码中的哪些偏移对应于原始源代码中的每一行。这对于打印更多信息的堆栈跟踪和提供诸如调试器中的单步等功能非常有用。您可能需要发布相应的Java代码。编辑post@SotiriosDelimanolisI后，在
javapjavap-c-verbosejavapjavap-c-verbose LineNumberTable: section