startframe.java

新功能坦克大战

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*;
public class StartFrame extends JFrame{
    JButton startbutton,rbutton,abutton;
    JPanel jp=new JPanel();
    JLabel startL,topL;
    JTextField L;
    int grade=1;
    String str;
    Font font=new Font("Serif",Font.PLAIN,30);
    StartFrame(){
        setTitle("坦克大战");
        setSize(600, 600);   
        setLocation(150, 100);  
        setBackground(Color.BLUE);  
        str=Integer.toString(grade);
        jp.setBackground(Color.CYAN);
        jp.setLayout(null);
        add(jp);
        rbutton=new JButton("<--");
        abutton=new JButton("-->");
        startbutton=new JButton("< >");
        startbutton.setSize(80, 55);
        rbutton.setSize(80, 55);
        abutton.setSize(80, 55);
        startbutton.setLocation(340, 340);
        rbutton.setLocation(180, 200);
        abutton.setLocation(340, 200);
        startbutton.setFont(font);
        rbutton.setFont(font);
        abutton.setFont(font);
        topL=new JLabel("请选择关数");
        startL=new JLabel("开 始",JLabel.CENTER);
        L=new JTextField(4);
        topL.setSize(200,55);
        L.setBackground(Color.CYAN);
        L.setSize(80, 55);
        startL.setSize(80, 55);
        L.setFont(font);
        topL.setFont(font);
        startL.setFont(font);
        topL.setLocation(220, 145);
        L.setLocation(260, 200);
        startL.setLocation(260, 340);
        L.setHorizontalAlignment(JTextField.CENTER);
        L.setEditable(false);
        jp.add(startbutton);
        jp.add(rbutton);
        jp.add(abutton);
        jp.add(topL);
        jp.add(startL);
        jp.add(L);
        L.setText(str);
        rbutton.addMouseListener(new MouseListener(){
            public void mouseClicked(MouseEvent e) { }

            public void mousePressed(MouseEvent e) {
                if(grade>1){
                    grade--;
                    str=Integer.toString(grade);
                    L.setText(str);
                }
            }

            public void mouseReleased(MouseEvent e) { }

            public void mouseEntered(MouseEvent e) { }

            public void mouseExited(MouseEvent e) { }
            
        });
        abutton.addMouseListener(new MouseListener(){

            public void mouseClicked(MouseEvent e) { }

            public void mousePressed(MouseEvent e) {
                if(grade<3){
                    grade++;
                    str=Integer.toString(grade);
                    L.setText(str);
                }
            }

            public void mouseReleased(MouseEvent e) { }

            public void mouseEntered(MouseEvent e) { }

            public void mouseExited(MouseEvent e) { }
            
        });
        setResizable(false);
        setVisible(true);
        addWindowListener(new K());  
    }
    private class K implements WindowListener{
        public void windowOpened(WindowEvent e) {
        }

        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }

        public void windowClosed(WindowEvent e) {
        }

        public void windowIconified(WindowEvent e) {
        }

        public void windowDeiconified(WindowEvent e) {
        }

        public void windowActivated(WindowEvent e) {
        }

        public void windowDeactivated(WindowEvent e) {
        }
    }
}