import java.util.Collections;
import java.util.SortedSet;
import java.util.TreeSet;

import javax.media.nativewindow.AbstractGraphicsDevice;
import javax.media.opengl.DefaultGLCapabilitiesChooser;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLCapabilitiesChooser;
import javax.media.opengl.GLCapabilitiesImmutable;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawableFactory;
import javax.media.opengl.GLPbuffer;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;

import org.junit.Test;

public class testJOGL2 {

	public static void main(String[] args) {
		testJOGL2 instance = new testJOGL2();
		instance.testJogl2ExtensionCheck();
	}

	@Test
	public void testJogl2ExtensionCheck() {
		GLProfile.initSingleton(false);
//		GLCapabilities caps = new GLCapabilities(GLProfile.get(GLProfile.GL2));
		GLCapabilities caps = new GLCapabilities(GLProfile.getDefault());
		GLCanvas glc = new GLCanvas(caps);
		GLDrawableFactory usine = glc.getFactory();
		GLCapabilitiesImmutable glci = glc.getChosenGLCapabilities();
		GLCapabilitiesChooser glcc = new DefaultGLCapabilitiesChooser();
		AbstractGraphicsDevice agd = usine.getDefaultDevice();
		
		GLPbuffer pbuffer = usine.createGLPbuffer(agd, glci, glcc, 256, 256, null);
		GLContext context = pbuffer.getContext();
		context.makeCurrent();
		GL2 gl = pbuffer.getContext().getGL().getGL2();
		
		String extensions = gl.glGetString(GL.GL_EXTENSIONS);
		String[] tabExtensions = extensions.split(" ");
		SortedSet<String> setExtensions = new TreeSet<String>();
		Collections.addAll(setExtensions, tabExtensions);
		System.out.println(setExtensions);
	}
}