… it hurts me hard to see the terminologie of jogl …
gl.glBegin(GL.GL_QUADS);
// Front Face
gl.glBindTexture(GL.GL_TEXTURE_2D, texture1);
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f( 1.0f, -1.0f, 1.0f);
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f( 1.0f, 1.0f, 1.0f);
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f(-1.0f, 1.0f, 1.0f);
double double double… baeh! 
why not this (i believe gl4java use it):
gl.Begin(QUADS);
// Front Face
gl.BindTexture(gl.TEXTURE_2D, texture1);
gl.TexCoord2f(0.0f, 0.0f); gl.Vertex3f(-1.0f, -1.0f, 1.0f);
gl.TexCoord2f(1.0f, 0.0f); gl.Vertex3f( 1.0f, -1.0f, 1.0f);
gl.TexCoord2f(1.0f, 1.0f); gl.Vertex3f( 1.0f, 1.0f, 1.0f);
gl.TexCoord2f(0.0f, 1.0f); gl.Vertex3f(-1.0f, 1.0f, 1.0f);
-
cleaner
-
more transparency
-
smaller
-
etc. etc. etc.
what do you think?