Question

我已经将带有html applet标签的applet启动迁移到带有applet描述符的jnlp部署。

使用applet解决方案，当浏览器窗口关闭时，java应用程序结束。

使用JNLP解决方案，当窗口关闭时，java应用程序不会停止。并引发了异常：

Plugin2Manager calling stopFailed() because of exception during AppContext.dispose()
Plugin2Manager calling stopFailed() because of displayable window         javax.swing.JFrame[frame0,240,1,1018x647,invalid,hidden,layout=java.awt.BorderLayout,title=TimeCheck,normal,defaultCloseOperation=HIDE_ON_CLOSE,rootPane=javax.swing.JRootPane[,3,32,1012x612,invalid,layout=javax.swing.JRootPane$RootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
Exception in thread "Thread-19" java.lang.NullPointerException
    at sun.plugin2.applet.Plugin2Manager.destroyAppContext(Unknown Source)
    at sun.plugin2.applet.JNLP2Manager.destroyAppContext(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.cleanupAppContext(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.shutdownAppContext(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.stop(Unknown Source)
    at sun.plugin2.applet.viewer.JNLP2Viewer$2$1.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

非常感谢。

Answer 1

解决方案是将WindowListener添加到topLevel框架。一旦我们拥有TopLevel框架，也可以设置Resizable。

    ....
    while (parent.getParent() != null)
        parent = parent.getParent();
        if (parent instanceof Frame) {
            ((Frame) parent).setResizable(true);
            ((Frame) parent).addWindowListener(this);
    }
    ....

close事件的事件处理程序将执行System.exit（）;

public void windowClosed(WindowEvent e) {
    // TODO Auto-generated method stub
    System.exit(0);
}

窗口关闭时的Java JNLP Applet不会停止

1 个答案: