当我在Eclipse中使用OpenGL时运行此代码时，我一直得到这个错误

Question

当我试图运行这个骨架代码时，我一直收到这个错误。我试图在Eclipse中使用OpenGL。我不知道是什么导致了这个问题。我如何解决这个问题？我也已经将jar文件添加到用户库中。

代码：

import com.jogamp.opengl.GL2;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLCapabilities;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.GLProfile;
import com.jogamp.opengl.awt.GLCanvas;
import com.jogamp.opengl.glu.GLU;
import java.lang.Math;
import javax.swing.JFrame;

class ThirdGLEventListener implements GLEventListener {
/**
 * Interface to the GLU library.
 */
   private GLU glu;
/**
 * Take care of initialization here.
 */

   public void init(GLAutoDrawable gld) {
       GL2 gl = gld.getGL().getGL2();
       glu = new GLU();
       gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
       gl.glViewport(-250, -150, 250, 150);
       gl.glMatrixMode(GL2.GL_PROJECTION);
       gl.glLoadIdentity();
       glu.gluOrtho2D(-250.0, 250.0, -150.0, 150.0);
    
   }
/**
 * Take care of drawing here.
 */
   public void display(GLAutoDrawable drawable) {
       GL2 gl = drawable.getGL().getGL2();
       gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
    /*
     * put your code here
     */
   }
   public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {

   }
   public void displayChanged(GLAutoDrawable drawable,
       boolean modeChanged, boolean deviceChanged) {

   }
   public void dispose(GLAutoDrawable arg0){

   }
}


public class Trial423Class{
   public static void main(String args[]){
    //getting the capabilities object of GL2 profile
       final GLProfile profile=GLProfile.get(GLProfile.GL2);
       GLCapabilities capabilities=new GLCapabilities(profile);
    // The canvas
       final GLCanvas glcanvas=new GLCanvas(capabilities);
       ThirdGLEventListener b=new ThirdGLEventListener();
       glcanvas.addGLEventListener(b);
       glcanvas.setSize(400, 400);
    //creating frame
       final JFrame frame=new JFrame("Basic frame");
    //adding canvas to frame
       frame.add(glcanvas);
       frame.setSize(640,480);
       frame.setVisible(true);
   }
}

这是我一直在犯的错误。

错误：错误1

错误2

Plhd-19/>（JComponent. java： 4839）在java.桌面/java. awt.容器. addNotify（容器. java： 2804）在java.桌面/javax. swing. JComponent. addNotify（JComponent. java： 4839）在java.桌面/javax. swing. JRootPane. addNotify（JRootPane. java： 729）在java.桌面/java. awt.容器. addNotify（容器. java： 2804）在java.桌面/java. awt. Windows. addNotify（Windows. java： 791）在java.桌面/java. awt. Windows. show（Windows. java： 1053）在java.桌面/java. awt. Component. show（Component. java： 1728）在java.桌面/

Answer 1

这是一个图书馆的错误。更新库。

接得好，谢谢。

这个打字错误是在我提交时出现的：

commit 0a6a592c04a85d8124aa9d38b67f0caa1d739b75  
Date:   Fri Dec 10 05:24:32 2010 +0100  

现在通过提交修复

commit d335d99df25cc929d06765c3f1af3944f124f6a7
Date:   Mon Jun 15 01:21:44 2020 +0200
    Fix 'typo' in branching, valid config index is >= 0 (not < 0)

    This issue was introduced in commit 0a6a592c04a85d8124aa9d38b67f0caa1d739b75
    and the '2nd choice branch' obviously never tested.

    Thanks to Lathanda finding this issue on 6/14/20.