package calculator; import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Toolkit; import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel; public class WindowF extends JFrame{
public WindowF(){
JFrame jf = new JFrame();
int s_x = Toolkit.getDefaultToolkit().getScreenSize().width;
int s_y = Toolkit.getDefaultToolkit().getScreenSize().height;
int x = 400;
int y = 300;
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocation(s_x/2-x/2,s_y/2-y/2);
setSize(x, y);
setTitle("呵呵");
setVisible(true);
JPanel jp1 = new JPanel();
JPanel jp2 = new JPanel();
Container c = jf.getContentPane();
c.add(jp1,BorderLayout.NORTH);
c.add(jp2,BorderLayout.CENTER);
jp1.add(new JButton("Hello"));
jp2.add(new JButton("button"));
}
public static void main(String args[]){
WindowF wf = new WindowF();
}
}