java.lang.OutOfMemoryError : Java heap space, 如何释放内存？

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 Audioclip，如果我在这个 JPanel 和另一个 JPanel 之间来回切换，则会出现此错误。我想在退出时使用 Audioclip 从 JPanel 中释放内存，但似乎为它分配 null 不起作用，知道吗？ PS AudioClip 类扩展了 JApplet，也许这是问题的原因？

按照此处的要求，是“泄漏”的代码部分: 这是音频剪辑

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;
}
}

这就是我更改 JPanel 的方法，gamePanel 是包含 AudioClip 的 JPanel，错误仅在 AudioClip 中发生，没有它，此代码没有问题。

        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

根据您的 RAM 增加堆值

示例:

-Xms512m 
-Xmx1024m

Java -Xmx1024m ......