Question

这是错误

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)

问题描述：在同一帧中我在JPanel之间切换，其中一个有一个Audioclip，如果我在这个JPanel和另一个之间来回切换我得到这个错误。当我退出它时，我想从带有Audioclip的JPanel释放内存，但似乎为它分配null不起作用，任何想法？ PS AudioClip类扩展了JApplet，也许是问题的原因？

这里要求的是“泄漏”的代码部分：这是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;
}
}

这就是我改变JPanels的方式，gamePanel是包含AudioClip的JPanel，只有AudioClip才会出现错误，没有它就没有问题。

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

        gamePanel=null;

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

Answer 1

您是否尝试过使用
设置JVM参数 1. -Xms作为堆的初始大小
2. -Xmx设置堆的最大大小

根据RAM增加堆值

示例：

-Xms512m -Xmx1024m Java -Xmx1024m ......

Answer 2

您可能需要分配更多内存。将对象分配为null只会将其标记为由gc清除。

看看这个link

Answer 3

在onDestroy（）或onPause（）

中调用以下方法

{{1}}

但是java内部调用System.gc（）方法这是不正确的释放内存的方法，但使用上面的代码内存很明显

Answer 4

如何在java中释放内存：

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

调用两次以获得更好的效果。

java.lang.OutOfMemoryError：Java堆空间，我如何释放内存？

4 个答案: