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import javax.swing.*;
import java.awt.*;
public class TestR extends JPanel {
public void drawMe() {
System.out.println("TestR's drawMe");
this.repaint();
}
@Override
protected void paintComponent(Graphics g) {
// TODO Auto-generated method stub
System.out.println("重新显示成功");
}
public static void main(String[] args){
JFrame frame=new JFrame("demo");
TestR panel=new TestR();
frame.getContentPane().add(panel);
// panel.drawMe();
frame.pack();
frame.setVisible(true);
}
}