I’ve done a post search and can’t find anyone having same issue as me. I’m using the current release binaries (1.1.0).
Please try this code:
import java.applet.Applet;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import com.sun.opengl.util.Animator;
import com.sun.opengl.util.BufferUtil;
public class VertexArrayTest extends Applet implements GLEventListener
{
Animator anim;
GLCanvas canvas;
public void start()
{
this.setSize(640, 480);
GLCapabilities glCaps = new GLCapabilities();
canvas = new GLCanvas( glCaps );
canvas.setSize(this.getSize());
canvas.setLocation(0, 0);
this.add( canvas );
canvas.addGLEventListener(this);
}
public void init(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
int[] v = new int[] {25, 25, 0,
100, 325, 0,
175, 25, 0,
175, 325, 0,
250, 25, 0,
325, 325, 0};
byte[] c = new byte[]{
(byte)255, (byte)0, (byte)0,
(byte)0, (byte)255, (byte)0,
(byte)0, (byte)0, (byte)255,
(byte)255, (byte)0, (byte)0,
(byte)0, (byte)255, (byte)0,
(byte)0, (byte)0, (byte)255,
};
IntBuffer vertices = BufferUtil.newIntBuffer(v.length);
ByteBuffer colors = BufferUtil.newByteBuffer(c.length);
vertices.put(v);
colors.put(c);
colors.rewind();
vertices.rewind();
gl.glEnableClientState (GL.GL_COLOR_ARRAY);
gl.glEnableClientState (GL.GL_VERTEX_ARRAY);
gl.glColorPointer (3, GL.GL_UNSIGNED_BYTE, 0, colors);
gl.glVertexPointer (3, GL.GL_INT, 0, vertices);
anim = new Animator(canvas);
anim.start();
}
public void display(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT );
IntBuffer buffer = BufferUtil.newIntBuffer(6);
buffer.rewind();
buffer.put(new int[]{0, 1, 2, 3, 4, 5}).rewind();
gl.glDrawElements( GL.GL_TRIANGLES,
6,
GL.GL_UNSIGNED_INT,
buffer );
}
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)
{
GL gl = drawable.getGL();
gl.glViewport (0, 0, drawable.getWidth(), drawable.getHeight());
gl.glMatrixMode (GL.GL_PROJECTION);
gl.glLoadIdentity ();
gl.glOrtho(0, drawable.getWidth(), 0, drawable.getHeight(), -1, 1);
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) { }
}
It runs fine. Two triangles adjacent to each other (one upside down). Now try running this code:
import java.applet.Applet;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import com.sun.opengl.util.Animator;
import com.sun.opengl.util.BufferUtil;
public class VertexArrayTest extends Applet implements GLEventListener
{
Animator anim;
GLCanvas canvas;
public void start()
{
this.setSize(640, 480);
GLCapabilities glCaps = new GLCapabilities();
canvas = new GLCanvas( glCaps );
canvas.setSize(this.getSize());
canvas.setLocation(0, 0);
this.add( canvas );
canvas.addGLEventListener(this);
}
public void init(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
int[] v = new int[] {25, 25, 0, 0,
100, 325, 0, 0,
175, 25, 0, 0,
175, 325, 0, 0,
250, 25, 0, 0,
325, 325, 0, 0};
byte[] c = new byte[]{
(byte)255, (byte)0, (byte)0,
(byte)0, (byte)255, (byte)0,
(byte)0, (byte)0, (byte)255,
(byte)255, (byte)0, (byte)0,
(byte)0, (byte)255, (byte)0,
(byte)0, (byte)0, (byte)255,
};
IntBuffer vertices = BufferUtil.newIntBuffer(v.length);
ByteBuffer colors = BufferUtil.newByteBuffer(c.length);
vertices.put(v);
colors.put(c);
colors.rewind();
vertices.rewind();
gl.glEnableClientState (GL.GL_COLOR_ARRAY);
gl.glEnableClientState (GL.GL_VERTEX_ARRAY);
gl.glColorPointer (3, GL.GL_UNSIGNED_BYTE, 0, colors);
gl.glVertexPointer (3, GL.GL_INT, 4, vertices);
anim = new Animator(canvas);
anim.start();
}
public void display(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT );
IntBuffer buffer = BufferUtil.newIntBuffer(6);
buffer.rewind();
buffer.put(new int[]{0, 1, 2, 3, 4, 5}).rewind();
gl.glDrawElements( GL.GL_TRIANGLES,
6,
GL.GL_UNSIGNED_INT,
buffer );
}
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)
{
GL gl = drawable.getGL();
gl.glViewport (0, 0, drawable.getWidth(), drawable.getHeight());
gl.glMatrixMode (GL.GL_PROJECTION);
gl.glLoadIdentity ();
gl.glOrtho(0, drawable.getWidth(), 0, drawable.getHeight(), -1, 1);
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) { }
}
I changed the vertex array to have an extraneous int in each row, and changed the glVertexPointer to stride over it (an int is 4 bytes, I hope I’m not that stupid 
). The triangles are no longer rendering correctly, it looks like the stride is not working correctly. Am I correct in assuming stride is the byte offset between vertexes, and a vertex in this case is made up of 3 ints? So shouldn’t a stride of 4 bytes be skipping over every 4th int?
Please let me know if I have it all wrong or if this is indeed a bug in JOGL 1.1.0 
