GL4Java-GL_LINES

I want to create axis lines. in the x,y,z direction crossing at (0,0,0). What I have produces one line in the y direction and a faint line in the x direction. What am I missing?

//GL4Java classes
import gl4java.*;

public class gl4java_axisLines {

GLFunc gl;

public gl4java_axisLines(GLFunc lib) {
gl = lib;

gl.glBegin(gl.GL_LINES);
   gl.glColor3f(1.0f,0.0f,0.0f);
   //gl.glTranslatef(12000.0f,0.0f,0.0f);      //X
   gl.glVertex3f(-12000.0f,0.0f,0.0f);
   gl.glVertex3f(12000.0f,0.0f,0.0f);

   gl.glColor3f(0.0f,1.0f,0.0f);
   //gl.glTranslatef(0.0f,-12000.0f,0.0f);   //Y
   gl.glVertex3f(0.0f,-12000.0f,0.0f);
   gl.glVertex3f(0.0f,12000.0f,0.0f);

   gl.glColor3f(1.0f,1.0f,0.0f);
   //gl.glTranslatef(0.0f,0.0f,12000.0f);    //Z
   gl.glVertex3f(0.0f,0.0f,-12000.0f);
   gl.glVertex3f(0.0f,0.0f,12000.0f);
   gl.glEnd();

}

}

Your code is good, check your camera position to ensure that (0,0,0) is within the view frustrum.