JFrame Interno?

Tem que usar o JInternalFrame.


Tenta ae e ve se funciona <img src="https://cdn.jsdelivr.net/gh/twitter/twemoji@14/assets/72x72/s.pnglight_smile.png?v=9" title=":slight_smile:" class="emoji" alt=":slight_smile:">





	public static void main(String[] args) {


		


		JFrame frame = new JFrame("Janela");


		JInternalFrame frameInt = new JInternalFrame("TESTE");


		


		frameInt.setSize(100,100);


		frame.setSize(500,500);


		


		frame.getContentPane().add(frameInt);


		


		frame.setVisible(true);


		frameInt.setVisible(true);


		


	}