java.lang.OutOfMemoryError: Java heap space, How can i free memory?

Question

Here is the error

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
at com.sun.media.sound.JavaSoundAudioClip.readStream(JavaSoundAudioClip.java:328)
at com.sun.media.sound.JavaSoundAudioClip.loadAudioData(JavaSoundAudioClip.java:307)
at com.sun.media.sound.JavaSoundAudioClip.<init>(JavaSoundAudioClip.java:93)
at sun.applet.AppletAudioClip.createAppletAudioClip(AppletAudioClip.java:108)
at sun.applet.AppletAudioClip.<init>(AppletAudioClip.java:49)
at java.applet.Applet.newAudioClip(Applet.java:279)
at tetris.TetrisAudioPlayer.<init>(TetrisAudioPlayer.java:31)
at tetris.GamePanel.<init>(GamePanel.java:181)
at tetris.TetrisPanelsController.actionPerformed(TetrisPanelsController.java:155)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6375)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6140)
at java.awt.Container.processEvent(Container.java:2083)
at java.awt.Component.dispatchEventImpl(Component.java:4737)
at java.awt.Container.dispatchEventImpl(Container.java:2141)
at java.awt.Component.dispatchEvent(Component.java:4565)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4619)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4280)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4210)
at java.awt.Container.dispatchEventImpl(Container.java:2127)
at java.awt.Window.dispatchEventImpl(Window.java:2482)
at java.awt.Component.dispatchEvent(Component.java:4565)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:684)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:643)
at java.awt.EventQueue$1.run(EventQueue.java:641)

Description of the problem: in the same frame I switch between JPanels, one of them has an Audioclip, if I switch back and forth between this JPanel and another I get this error. I want to free the memory from the JPanel with the Audioclip when I quit it, but seems that assigning null to it doesn't work, any idea? PS The AudioClip class extends JApplet, maybe it is the cause of the problem?

As requested here is the portion of code that "leaks": This is the AudioClip

import java.applet.*;
import javax.swing.*;
import java.net.*;


public class TetrisAudioPlayer extends JApplet {

private AudioClip song; // Sound player

private URL songPath; // Sound path

private boolean playing;

public TetrisAudioPlayer(String filename) {

    try {

        //songPath = new URL(getCodeBase(),filename); // Get the Sound URL

        songPath= this.getClass().getResource(filename);

        song = Applet.newAudioClip(songPath); // Load the Sound
    }

    catch(Exception e){} // Satisfy the catch

}

public void playSound() {
    song.loop(); // Play
    playing=true;
}

public void stopSound() {
    song.stop(); // Stop
    playing=false;
}

public void playSoundOnce() {
    song.play(); // Play only once
    playing=true;
}

public boolean playing(){
    return playing;
}
}

And this is how I change the JPanels, gamePanel is the JPanel wich contains the AudioClip, the error occur only with the AudioClip, without it there is no problem with this code.

        tetrisFrame.getContentPane().removeAll();
        tetrisFrame.getContentPane().invalidate();

        gamePanel=null;

        mainMenuPanel= new MainMenuPanel(this);
        tetrisFrame.getContentPane().add(mainMenuPanel);
        tetrisFrame.getContentPane().validate();
        tetrisFrame.getContentPane().repaint();

There's no way for us to identify any issues if no code is reproduced. Please copy the relevant portions of the code here. — Kevin Ji
– Kevin Ji, Commented May 20, 2012 at 18:04
Better yet, specify JRE version and paste the command-line arguments. — mazaneicha
– mazaneicha, Commented May 20, 2012 at 18:47

Siva Charan · Accepted Answer · 2012-05-20 18:23:58Z

3

Have you tried by setting the JVM arguments with
1. -Xms as the initial size of the heap
2. -Xmx which sets the maximum size of the heap

Increase the heap value based on your RAM

Example:

-Xms512m 
-Xmx1024m

Java -Xmx1024m ......

edited May 20, 2012 at 18:23

answered May 20, 2012 at 18:06

Siva Charan

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8 Comments

richarbernal Over a year ago

This question is not about eclipse

Siva Charan Over a year ago

@richarbernal: But these might be simple issues, which developer can encounter.

Marko Topolnik Over a year ago

But changing eclipse memory will have no influence on the JVM inside which the code runs.

Perception Over a year ago

A simple edit would make this answer more applicable to the posed question. On the other hand, simply increasing the heap size will not fix the underlying issue, it will just postpone the eventual crash.

Siva Charan Over a year ago

@MarkoTopolnik: While running through command line, if developer sets max heap size -Xmx1024m and runs it. There is a chance to execute, If feel.

|

Community · Accepted Answer · 2017-05-23 12:15:50Z

2

You might have to assign more memory. Assigning an object to null just marks it to be cleared by the gc.

Have a look at this link

edited May 23, 2017 at 12:15

CommunityBot

11 silver badge

answered May 20, 2012 at 18:07

JHS

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Comments

Yogesh Rathi · Accepted Answer · 2016-04-05 10:04:29Z

0

Call below method in onDestroy() or onPause()

Runtime.getRuntime().runFinalization();
Runtime.getRuntime().gc();
System.gc();

But java internally call System.gc() method this is not correct way to free memory , but using above code memory was clear

answered Apr 5, 2016 at 10:04

Yogesh Rathi

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Comments

gnat · Accepted Answer · 2012-09-25 14:09:58Z

-1

How to free memory in java:

public void freememory(){
    Runtime basurero = Runtime.getRuntime(); 
    basurero.gc();
}

Call this twice to get better results.

edited Sep 25, 2012 at 14:09

gnat

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answered Sep 11, 2012 at 22:53

emg

11

1 Comment

LanguagesNamedAfterCofee Over a year ago

Calling System.gc() and variations only SUGGEST the garbage collector to run. There's no guarantee.

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