Position on Screen Right Bottom

北战南征 提交于 2019-11-28 01:12:14

Try the example below. Note how pack() "Causes this Window to be sized to fit the preferred size and layouts of its subcomponents."

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JPanel;

/** @see http://stackoverflow.com/q/9753722/230513 */
public class LowerRightFrame {

    private void display() {
        JFrame f = new JFrame("LowerRightFrame");
        f.add(new JPanel() {

            @Override // placeholder for actual content
            public Dimension getPreferredSize() {
                return new Dimension(320, 240);
            }

        });
        f.pack();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice defaultScreen = ge.getDefaultScreenDevice();
        Rectangle rect = defaultScreen.getDefaultConfiguration().getBounds();
        int x = (int) rect.getMaxX() - f.getWidth();
        int y = (int) rect.getMaxY() - f.getHeight();
        f.setLocation(x, y);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new LowerRightFrame().display();
            }
        });
    }
}

The easiest way I know is to nest JPanels each using its own layout manager.

  • The main JPanel would use a BorderLayout
  • Another JPanel that is added to the main at BorderLayout.SOUTH position also uses BorderLayout.
  • the component that needs to go at the SE corner is added to the above JPanel at the BorderLayout.EAST position.
  • In general, you're almost always better off using layout managers vs. trying to set absolute position of components.
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