java类的声明

来源：百度知道 编辑：UC知道 时间：2024/06/06 18:57:04
import java.awt.*;
import javax.swing.*;

public class GriLayoutDemo{
private JFrame frame;
private JButton b1,b2,b3,b4,b5,b6;

public static void main(String args[]){
GridLayoutDemo that=new GridLayoutDemo();
that.go();
}
void go(){
frame=new JFrame("Grid example");
Container contentPane=frame.getContentPane();
ContentPane.setLayout(new GridLayout(3,2));
b1=newJButton("Grid_1");
b2=newJButton("Grid_2");
b3=newJButton("Grid_3");
b4=newJButton("Grid_4");
b5=newJButton("Grid_5");
b6=newJButton("Grid_6");

contentPane.add(b1);
contentPane.add(b2);
contentPane.add(b3);
contentPane.add(b4);
contentPane.add(b5);
contentPane.add(b6);

frame.pack();
frame.setVisible(true);
}
}

import java.awt.*;
import javax.swing.*;

public class GriLayoutDemo extends JFrame{
private JFrame frame;

private JButton b1, b2, b3, b4, b5, b6;

public GriLayoutDemo() {
super();
frame = new JFrame("Grid example");
Container contentPane = frame.getContentPane();
contentPane.setLayout(new GridLayout(3, 2));
b1 = new JButton("Grid_1");
b2 = new JButton("Grid_2");
b3 = new JButton("Grid_3");
b4 = new JButton("Grid_4");
b5 = new JButton("Grid_5");
b6 = new JButton("Grid_6");

contentPane.add(b1);
contentPane.add(b2);
contentPane.add(b3);
contentPane.add(b4);
contentPane.add(b5);
contentPane.add(b6);

frame.pack();
frame.setVisible(true);
}

public static void main(String args[]) {
GriLayoutDemo that = new GriLay