title: Make JFrame display other JFrame without opening new window
body: <p>I'm not sure if this has been answered or the correct way of phrasing it, but have had no luck in my search. I have 4 JFrame guis all in their own classes: a main gui and 3 others. I want to know if it is possible to display the other guis inside the same window without opening a new window and setting the first window to a false visibility? I'm able to call the other JFrames and make them display through a series of actionlisteners, but they open another window, making me have to setVisible(false) the gui window. I want to be able to have all the guis display in the same window without opening/closing windows. Thanks</p>