How to use

WeldJointDef

in

org.jbox2d.dynamics.joints

  @Override
  public org.jbox2d.dynamics.joints.JointDef toJBox2d () {
    org.jbox2d.dynamics.joints.WeldJointDef jd = new org.jbox2d.dynamics.joints.WeldJointDef();
    jd.bodyA = bodyA.body;
    jd.bodyB = bodyB.body;
    jd.collideConnected = collideConnected;
    jd.dampingRatio = dampingRatio;
    jd.frequencyHz = frequencyHz;
    jd.localAnchorA.set(localAnchorA.x, localAnchorA.y);
    jd.localAnchorB.set(localAnchorB.x, localAnchorB.y);
    jd.referenceAngle = referenceAngle;
    jd.type = org.jbox2d.dynamics.joints.JointType.WELD;
    return jd;
  }
}

 Body circleBody ... ;// having large radius
//for all balls arranged in hexagon structure
foreach BallBody b
{
WeldJointDef def = new WeldJointDef();
def.initialize(b, circleBody, b.getWorldCenter());
mPhysicsWorld.createJoint(def);
}

fd.density = 20.0f;
WeldJointDef jd = new WeldJointDef();
 jd.initialize(prevBody, body, anchor);
 getWorld().createJoint(jd);
fd.density = 20.0f;
WeldJointDef jd = new WeldJointDef();
jd.frequencyHz = 5f;
jd.dampingRatio = .7f;
 jd.initialize(prevBody, body, anchor);
 getWorld().createJoint(jd);
WeldJointDef jd = new WeldJointDef();
  jd.initialize(prevBody, body, anchor);
  getWorld().createJoint(jd);
WeldJointDef jd = new WeldJointDef();
jd.frequencyHz = 8f;
jd.dampingRatio = .7f;
  jd.initialize(prevBody, body, anchor);
  getWorld().createJoint(jd);

fd.density = 20.0f;
WeldJointDef jd = new WeldJointDef();
 jd.initialize(prevBody, body, anchor);
 getWorld().createJoint(jd);
fd.density = 20.0f;
WeldJointDef jd = new WeldJointDef();
jd.frequencyHz = 5f;
jd.dampingRatio = .7f;
 jd.initialize(prevBody, body, anchor);
 getWorld().createJoint(jd);
WeldJointDef jd = new WeldJointDef();
  jd.initialize(prevBody, body, anchor);
  getWorld().createJoint(jd);
WeldJointDef jd = new WeldJointDef();
jd.frequencyHz = 8f;
jd.dampingRatio = .7f;
  jd.initialize(prevBody, body, anchor);
  getWorld().createJoint(jd);

 WeldJointDef wd = new WeldJointDef();
wd.bodyA = body1;
wd.bodyB = body2;
wd.referenceAngle = wd.bodyB.getAngle() - wd.bodyA.getAngle();
world.createJoint( wd );

WeldJointDef def = new WeldJointDef();
jd = def;
def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));