How to replace JPanel with another JPanel

Question

I want to replace a Jpanel with another one in a JFrame I already search and try my code but nothing\'s happen this is my code :

public class Frame extends          


        

Answer 1

Assume you have a function, generatePanel() that returns a JPanel that you save in an instance variable of type JPanel:

private JPanel panelWithDynamicContent;

Assume you have already placed that JPanel into a container, perhaps at a specific index within that other container and want to preserve the order of the components within that container. Instead of destroying everything using removeAll(), I prefer a more precise approach that replaces only the component that needs to be replaced:

private void replacePanel(){
   Container parent = this.panelWithDynamicContent.getParent();
   int index = parent.getComponentZOrder(this.panelWithDynamicContent);
   // remove the old edition of the panel
   parent.remove(this.panelWithDynamicContent);
   // generate the replacement panel
   this.panelWithDynamicContent = generatePanel();
   // place the replacement panel in the same relative location as the one it is replacing
   parent.add(this.panelWithDynamicContent, index);

   // must call both of these, in the correct order
   parent.validate();
   parent.repaint();
}