swing - Communication between GUI Java -

i have 3 classes create objects jpanels ie myobject extends jpanel. call 3 panels in main method call.

 myobject1 mo1 = new myobject1(); // contains textfield , button  myobject2 mo2 = new myobject2(); // contains textarea holding long paragraph  myobject3 mo3 = new myobject3(); 

how can mo1 call methods on mo2 changing text of text area?

thanks suggestions guys! gonna go ahead , accept first answer. solved problem.

update 1 of these panels combination of 2 panels in program, hindering ability pass instance of object class. removing panel class , creating jpanel in main adding 2 panels new jpanel able pass instances of classes each constructor.

so in turn solution

jpanel panelholder = new jpanel(); // create panel in main instead of new class myobject2 mo2 = new myobject2(); // contains textarea holding long paragrah myobject1 mo1 = new myobject1(mo2); // contains textfield , button panelholder.add(mo1); panelholder.add(mo2); myobject3 mo3 = new myobject3(); 

and in mo2 class:

private myobject1 object1;  // constructor mo2 class public myobject2(myobject1 object1){  this.object1 = object1; // instance of object1 ....// other constructor pieces } 

again guys!

why don't pass reference myobject1 instance constructor of myobject2?

 myobject1 mo1 = new myobject1();  myobject2 mo2 = new myobject2(mo1); 

then, (assuming method public or package-private) can call mo1.methodname() mo2. mentioned in comments, should instantiate components plan edit in mo1 in constructor, avoid nullpointerexceptions when make call mo2.