." Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved.

.TH javap 1 "10 May 2011"

javap [ \fP\f3options\fP\f3 ] classes

.LP

The \f3javap\fP command disassembles one or more class files. Its output depends on the options used. If no options are used, \f3javap\fP prints out the package, protected, and public fields and methods of the classes passed to it. \f3javap\fP prints its output to stdout.

.LP

.RS 3

.TP 3

options 

Command\-line options. 

.TP 3

classes 

List of one or more classes (separated by spaces) to be processed for annotations (such as \f2DocFooter.class\fP). You may specify a class that can be found in the class path, by its file name (for example, \f2/home/user/myproject/src/DocFooter.class\fP), or with a URL (for example, \f2file:///home/user/myproject/src/DocFooter.class\fP). 

.RE

For example, compile the following class declaration:

The output from \f3javap DocFooter.class\fP yields:

Compiled from "DocFooter.java"

  java.lang.String date;

  java.lang.String email;

  public DocFooter();

  public void init();

  public void paint(java.awt.Graphics);

The output from \f3javap \-c DocFooter.class\fP yields:

Compiled from "DocFooter.java"

  java.lang.String date;

  java.lang.String email;

  public DocFooter();

    Code:

       0: aload_0       

       1: invokespecial #1                  // Method java/applet/Applet."<init>":()V

.fl

       4: return        

  public void init();

    Code:

       0: aload_0       

       1: sipush        500

       4: bipush        100

       6: invokevirtual #2                  // Method resize:(II)V

       9: aload_0       

      10: aload_0       

      11: ldc           #3                  // String LAST_UPDATED

      13: invokevirtual #4                  // Method getParameter:(Ljava/lang/String;)Ljava/lang/String;

      16: putfield      #5                  // Field date:Ljava/lang/String;

      19: aload_0       

      20: aload_0       

      21: ldc           #6                  // String EMAIL

      23: invokevirtual #4                  // Method getParameter:(Ljava/lang/String;)Ljava/lang/String;

      26: putfield      #7                  // Field email:Ljava/lang/String;

.fl

      29: return        

  public void paint(java.awt.Graphics);

    Code:

       0: aload_1       

       1: new           #8                  // class java/lang/StringBuilder

       4: dup           

       5: invokespecial #9                  // Method java/lang/StringBuilder."<init>":()V

       8: aload_0       

.fl

       9: getfield      #5                  // Field date:Ljava/lang/String;

      12: invokevirtual #10                 // Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;

      15: ldc           #11                 // String  by 

      17: invokevirtual #10                 // Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;

      20: invokevirtual #12                 // Method java/lang/StringBuilder.toString:()Ljava/lang/String;

      23: bipush        100

.fl

      25: bipush        15

      27: invokevirtual #13                 // Method java/awt/Graphics.drawString:(Ljava/lang/String;II)V

      30: aload_1       

      31: aload_0       

      32: getfield      #7                  // Field email:Ljava/lang/String;

      35: sipush        290

      38: bipush        15

      40: invokevirtual #13                 // Method java/awt/Graphics.drawString:(Ljava/lang/String;II)V

      43: return        

}

\-help \-\-help \-? 

\-version 

Prints out version information. 

.TP 3

\-private \-p 

\-sysinfo 

Shows system information (path, size, date, MD5 hash) of the class being processed. 

.TP 3

\-constants 

Shows static final constants. 

.TP 3

Specifies the path \f3javap\fP uses to look up classes. Overrides the default or the CLASSPATH environment variable if it is set.