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| 14. 81. 7. Determining When a Component Has Been Made Visible, Moved, or Resized |
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import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import javax.swing.JFrame;
public class Main {
public static void main() {
ComponentListener listener = new ComponentAdapter() {
public void componentShown(ComponentEvent evt) {
Component c = (Component) evt.getSource();
System.out.println("Component is now visible");
}
public void componentHidden(ComponentEvent evt) {
Component c = (Component) evt.getSource();
System.out.println("Component is now hidden");
}
public void componentMoved(ComponentEvent evt) {
Component c = (Component) evt.getSource();
Point newLoc = c.getLocation();
System.out.println("Get new location");
}
public void componentResized(ComponentEvent evt) {
Component c = (Component) evt.getSource();
Dimension newSize = c.getSize();
System.out.println("Get new size");
}
};
JFrame frame = new JFrame();
frame.setSize(300, 300);
frame.addComponentListener(listener);
frame.setVisible(true);
}
}
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