revalidatejava,javarevalidate（）/repaint（）在ActionListener中不起作用堆栈内存溢出...

我试图将OpenGL上下文添加到jFrame。

当我这样做时它会起作用&＃xff1a;

jframe.setVisible( true );

jframe.getContentPane().add( glcanvas, BorderLayout.CENTER );

jframe.revalidate();

jframe.repaint();

但是&＃xff0c;如果我尝试在按钮上创建上下文&＃xff0c;则单击&＃xff0c;如下所示&＃xff1a;

JButton startButton &＃61; new JButton("Start");

startButton.addActionListener(

new ActionListener()

{

&＃64;Override

public void actionPerformed(ActionEvent e)

{

jframe.getContentPane().add( glcanvas, BorderLayout.CENTER );

jframe.revalidate();

jframe.repaint();

}

});

jframe.add(startButton);

那什么也没发生 如果我尝试对其进行调试&＃xff0c;则程序将通过revalidate()和repaint()命令运行&＃xff0c;但没有任何变化。

有人可以告诉我为什么会发生这种情况吗&＃xff1f;当我尝试按按钮调用它时&＃xff0c;为什么会有所不同&＃xff1f; 您还可以建议解决此问题的方法吗&＃xff1f; 我需要能够从菜单系统中打开上下文。

-编辑&＃xff1a;这是我测试程序的完整代码

/* -- OpenGL -- */

import javax.media.opengl.GL2ES2;

import javax.media.opengl.GLAutoDrawable;

import javax.media.opengl.GLCapabilities;

import javax.media.opengl.GLEventListener;

import javax.media.opengl.GLProfile;

import javax.media.opengl.awt.GLCanvas;

import javax.media.opengl.awt.GLJPanel;

import javax.swing.JComponent;

/* -- Swing -- */

import javax.swing.JFrame;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.JPanel;

/* -- jFrame Layouts -- */

import java.awt.BorderLayout;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class Menu

{

public static void main(String[] args)

{

GLProfile glprofile &＃61; GLProfile.getDefault();

GLCapabilities glcapabilities &＃61; new GLCapabilities( glprofile );

final GLCanvas glcanvas &＃61; new GLCanvas( glcapabilities );

glcanvas.addGLEventListener( new GLEventListener()

{

&＃64;Override

public void init( GLAutoDrawable glautodrawable )

{

System.out.println("INIT");

}

&＃64;Override

public void reshape( GLAutoDrawable glautodrawable, int x, int y, int width, int height )

{

GL2ES2 gl &＃61; glautodrawable.getGL().getGL2ES2(); //Get OpenGL

gl.glViewport( 0, 0, width, height ); //Set the viewport

}

&＃64;Override

public void display( GLAutoDrawable glautodrawable )

{

GL2ES2 gl &＃61; glautodrawable.getGL().getGL2ES2();

gl.glClearColor(&＃43;0.0f, &＃43;0.2f, &＃43;0.9f, &＃43;0.0f); // Blue background

//Clear the screen so that we can draw the new one

gl.glClear(

GL2ES2.GL_STENCIL_BUFFER_BIT |

GL2ES2.GL_COLOR_BUFFER_BIT |

GL2ES2.GL_DEPTH_BUFFER_BIT

);

}

&＃64;Override

public void dispose( GLAutoDrawable glautodrawable )

{

}

}); /* Add GLEventListner to glCanvas */

final JFrame jframe &＃61; new JFrame( "One Triangle Swing GLCanvas" );

jframe.addWindowListener( new WindowAdapter()

{

public void windowClosing( WindowEvent windowevent )

{

jframe.dispose();

System.exit( 0 );

}

});

jframe.setSize( 800, 600 );

jframe.setVisible( true );

/* --- IF I ADD THE ContentPane HERE AND REVALIDATE/REPAINT IT WORKS --- */

//jframe.getContentPane().add( glcanvas, BorderLayout.CENTER );

//jframe.revalidate();

//jframe.repaint();

jframe.setLayout(new FlowLayout());

JButton startButton &＃61; new JButton("Start");

startButton.addActionListener(

new ActionListener()

{

&＃64;Override

public void actionPerformed(ActionEvent e)

{

/* --- I NEED TO ADD THE ContentPane HERE, BUT IF I DO THIS THE REPAINT DOESN&＃39;T WORK --- */

jframe.getContentPane().add( glcanvas, BorderLayout.CENTER );

jframe.revalidate();

jframe.repaint();

/* -- I added this because I was told elsewhere that repainting

* in a different thread would make it work, however I haven&＃39;t

* been successful in getting this to work. Included for information

*/

//repaintThread(jframe);

}

});

jframe.add(startButton);

}

private static void repaintThread(final JFrame jframe)

{

Thread thread &＃61; new Thread(new Runnable()

{

public void run()

{

for( int i &＃61; 0; i <200; i&＃43;&＃43;)

{

jframe.revalidate();

jframe.repaint();

try

{

Thread.currentThread().sleep( 50 );

}

catch( Exception ex )

{

break;

}

}

}

});

thread.setPriority(Thread.NORM_PRIORITY);

thread.start();

}

}