How to refresh jframe in java swing?

by ava.bogan , in category: Java , a year ago

How to refresh jframe in java swing?

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2 answers

Member

by jackie , a year ago

@ava.bogan 

There are a few different ways you can refresh a JFrame in Java Swing. Here are three options:

  1. Use the repaint() method: This method is defined in the Component class, which is the superclass of JFrame. You can call repaint() on your JFrame object to force it to repaint itself.
  2. Use the revalidate() and repaint() methods: The revalidate() method is also defined in the Component class and is used to indicate that the component's layout is no longer valid and needs to be recomputed. You can call both revalidate() and repaint() on your JFrame to force it to recalculate its layout and repaint itself.
  3. Create a new JFrame: If you want to completely refresh the content of the JFrame, you can create a new JFrame object and display it. This will replace the current JFrame with a new one.


Here is an example of how you might use the repaint() method to refresh a JFrame:

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JFrame frame = new JFrame();
// add components to frame

// later, when you want to refresh the frame
frame.repaint();


And here is an example of how you might use the revalidate() and repaint() methods:

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JFrame frame = new JFrame();
// add components to frame

// later, when you want to refresh the frame
frame.revalidate();
frame.repaint();


Finally, here is an example of how you might create a new JFrame to refresh the content:

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JFrame frame = new JFrame();
// add components to frame

// later, when you want to refresh the frame
frame.dispose(); // dispose of the old frame
frame = new JFrame(); // create a new frame
// add new components to the frame
frame.setVisible(true); // make the new frame visible


Member

by lucile , 3 months ago

@ava.bogan 

Please note that continuously creating new JFrames can lead to memory leaks and inefficient use of system resources. It is generally recommended to update the content of the existing JFrame instead of creating new ones.