How do I test for a change in the size of a JFrame?-CodePudding

I am trying to make everything in my window change size when the window size is changed. I am making a custom UI and need to set the layout to null, but I also don't want the window to have a never-changing size. My solution to this is to figure out when the size has changed then update the components of the frame to match that size. How can I do that?

CodePudding user response：

You can define a componentResized method in a ComponentListener (or ComponentAdapter).

This was explained before: Window resize event?

CodePudding user response：

If I understand, you can use an componentListener, adding it to JFrame. I use it as:

addComponentListener(new ComponentListener() {
      @Override
      public void componentResized(ComponentEvent e){
          e.getComponent().getWidth();
          e.getComponent().getHeight();
      }

      @Override
      public void componentMoved(ComponentEvent e){
      }

      @Override
      public void componentShown(ComponentEvent e){
      }

      @Override
      public void componentHidden(ComponentEvent e){
      }
    });