---
name: "javap-openjdk11"
section: "1"
platform: "linux"
package: "jdk11-openjdk"
version: "11.0.32.1.u1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/javap-openjdk11"
---

# javap-openjdk11(1)

Disassembles one or more class files.

## NAME

javap - Disassembles one or more class files.

## SYNOPSIS

```
javap [options] classfile...
```

*options*

The command-line options. See Options.

*classfile*

One or more classes separated by spaces to be processed for annotations such as DocFooter.class. You can specify a class that can be found in the class path, by its file name or with a URL such as **file:///home/user/myproject/src/DocFooter.class**.

## DESCRIPTION

The **javap** command disassembles one or more class files. The output depends on the options used. When no options are used, then the **javap** command prints the package, protected and public fields, and methods of the classes passed to it. The **javap** command prints its output to **stdout**.

## OPTIONS

- \-help --help -?

  Prints a help message for the **javap** command.

- \-version

  Prints release information.

- \-l

  Prints line and local variable tables.

- \-public

  Shows only public classes and members.

- \-protected

  Shows only protected and public classes and members.

- \-private -p

  Shows all classes and members.

- \-J*option*

  Passes the specified option to the JVM. For example:

  ```
  javap -J-version
  javap -J-Djava.security.manager -J-Djava.security.policy=MyPolicy MyClassName
  ```

  For more information about JVM options, see the command documentation.

- \-s

  Prints internal type signatures.

- \-sysinfo

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

- \-constants

  Shows **static final** constants.

- \-c

  Prints disassembled code, for example, the instructions that comprise the Java bytecodes, for each of the methods in the class.

- \-verbose

  Prints stack size, number of locals and arguments for methods.

- \-classpath *path*

  Specifies the path the **javap** command uses to look up classes. Overrides the default or the **CLASSPATH** environment variable when it is set.

- \-bootclasspath *path*

  Specifies the path from which to load bootstrap classes. By default, the bootstrap classes are the classes that implement the core Java platform located in **jre/lib/rt.jar** and several other JAR files.

- \-extdir *dirs*

  Overrides the location at which installed extensions are searched for. The default location for extensions is the value of **java.ext.dirs**.

## EXAMPLE

Compile the following **DocFooter** class:

```
import java.awt.*;
import java.applet.*;

public class DocFooter extends Applet {
        String date;
        String email;

        public void init() {
                resize(500,100);
                date = getParameter("LAST_UPDATED");
                email = getParameter("EMAIL");
        }

        public void paint(Graphics g) {
                g.drawString(date + " by ",100, 15);
                g.drawString(email,290,15);
        }
}
```

The output from the **javap DocFooter.class** command yields the following:

```
Compiled from "DocFooter.java"
public class DocFooter extends java.applet.Applet {
  java.lang.String date;
  java.lang.String email;
  public DocFooter();
  public void init();
  public void paint(java.awt.Graphics);
}
```

The output from **javap -c DocFooter.class** command yields the following:

```
Compiled from "DocFooter.java"
public class DocFooter extends java.applet.Applet {
  java.lang.String date;
  java.lang.String email;
  public DocFooter();
    Code:
       0: aload_0
       1: invokespecial #1                  // Method
java/applet/Applet."<init>":()V
       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;
      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
       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
      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
}
```

## SEE ALSO

• java(1)

• javac(1)

• javadoc(1)

• jdb(1)

• jdeps(1)