Glut Solid Shape Renders as Wire when calling GLClear in JOGL

I am trying to render some simple solid shapes in JOGL (and Eclipse) and then step through them 'layer' by 'layer'; but when I add the glClear method all I get are wire frames, not the filled shape!? If I comment that line out (as below) displays the solid shape but 'fills' to the largest the shape will be and then does not shrink down again. e.g with a sphere the front half is fine but the back half comes out as a solid cylinder if that makes sense.

public void render(GLAutoDrawab开发者_StackOverflowle gLDrawable)
{       
    GL2 gl = gLDrawable.getGL().getGL2();

    **//gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);**

    gl.glColor3b((byte) 0, (byte) 127, (byte) 0);   
    gl.glLoadIdentity();

    gl.glTranslatef(500, 350, -300);

    glut.glutSolidSphere(300.0, 20, 16);

    gl.glTranslatef(-500, -350, 300);       


    gl.glEnd();     
    gl.glFlush();
}

Any help would be much appreciated, Ic an post more of the code if needed.

Thanks Tim

EDITED To make more sense

---

insert this before you create your sphere... It will tell Opengl to fill the next polygons that are drawn...

gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL);

if you want the wireframe again, just call:

gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_LINE);

:)