继承JFrame，只是初步

  1 import java.awt.*;
  2 import javax.swing.*;
  3 import javax.swing.JFrame;
  4 import java.awt.event.WindowListener;
  5 import java.awt.event.WindowEvent;
  6 import java.awt.event.WindowAdapter;
  7 import java.awt.event.ActionListener;
  8 import java.awt.event.ActionEvent;
  9 class QQ extends JFrame   //继承JFrame
 10 {
 11     
 12 }
 13 class FixFrame extends JFrame
 14 {
 15     this.setResizable(false);
 16     this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 17 }
 18 class ResizableFrame extends JFrame
 19 {
 20     this.setResizable(true);
 21     this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 22 }
 23 class LoginFrame extends FixFrame
 24 {
 25     LoginFrame()  //构造函数
 26     {
 27         display();//调用display()函数
 28     }
 29     private JButton btn1;
 30     private JButton btn2;
 31     private JTextField jtf1;
 32     private JPasswordField jpf1; //密码文本
 33     private ImageIcon img1;
 34     private JLabel background1;
 35     private ImageIcon img2;
 36     private JLabel background2;
 37     private JLabel lab1;
 38     private Font fnt;
 39     private JLabel lab2;
 40     private Image im1;
 41     private ImageIcon im2;
 42     private MyListener ltn;
 43     private BtnAction act;
 44     private BtnAction2 act2;
 45     class MyListener extends WindowAdapter //适配器   是扩展  不需要覆盖WindowAdapter中的所有方法 功能代码较多
 46     {
 47         public void windowClosing(WindowEvent e)
 48         {
 49             System.out.println("windowClosing");
 50             int res = JOptionPane.showConfirmDialog(null,"是否退出程序应用","提示", JOptionPane.YES_NO_OPTION); //弹出消息框
 51             System.out.println("res =" + res);
 52             if(res == 0)
 53             {
 54                 System.out.println("退出");
 55                 System.exit(1);// 退出
 56                 System.out.println("退出1"); //不输出  因为exit先执行
 57             }
 58             else if(res == 1)
 59             {
 60                 System.out.println("不退出");
 61                 setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
 62                 //System.exit(1);// 退出
 63                 // 不退出
 64             }
 65         }
 66     }
 67     class BtnAction implements ActionListener  //btn事件
 68     {
 69         public void actionPerformed(ActionEvent e)
 70         {
 71             System.out.println("actionPerformed");
 72             if(jtf1.getText().equals("jk") && jpf1.getText().equals("jk"))
 73             {
 74                 System.out.println("OK");
 75                 dispose();
 76                 (new JFrame("主窗口")).setVisible(true);
 77             }
 78             else
 79             {
 80                 System.out.println("Error");
 81                 JOptionPane.showConfirmDialog(null,"密码错误","提示", JOptionPane.DEFAULT_OPTION);
 82             }
 83         }
 84     }
 85     class BtnAction2 implements ActionListener   //内部类
 86     {
 87         public void actionPerformed(ActionEvent e)
 88         {
 89             Object o = e.getSource();
 90             JButton b = (JButton)o;  //强制类型转换
 91             System.out.println("芝麻开门" + btn2.getText());  //类的成员/函数，可以在内部类中使用
 92             
 93             if(b == btn2) //b.getSource == "重置"
 94             {
 95                 jtf1.setText("");
 96                 jpf1.setText("");
 97             }
 98         }
 99     }
100     public void display()
101     {
102         //JFrame frm = new JFrame(); //窗体
103         img1 = new ImageIcon("timg.gif"); //背景
104         background1 = new JLabel(img1);
105         this.getLayeredPane().add(background1, new Integer(Integer.MIN_VALUE)); 
106         //background.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());
107         background1.setBounds(0, 0, 425, 450);
108         img2 = new ImageIcon("33.gif"); 
109         background2 = new JLabel(img2);
110         this.getLayeredPane().add(background2, new Integer(Integer.MIN_VALUE)); 
111         background2.setBounds(0, 0, img2.getIconWidth(), img2.getIconHeight());
112         
113         jtf1 = new JTextField(30); //文本
114         //jtf1.setColumns(10);
115         jtf1.setSize(200,35);
116         jtf1.setLocation(130,130);
117         jpf1 = new JPasswordField(30); //密码文本
118         //jpf1.setEchoChar('#');     设置密码文本内容
119         jpf1.setSize(200,35);
120         jpf1.setLocation(130,180);
121         
122         lab1 = new JLabel("账号："); //标题
123         fnt = new Font("Serief",Font.ITALIC+Font.BOLD,15);
124         lab1.setFont(fnt);
125         lab1.setBackground(Color.BLUE); //label的背景颜色
126         lab1.setOpaque(true); //label是否透明
127         lab1.setForeground(Color.YELLOW); //label前景色
128         lab2 = new JLabel("密码：");
129         lab1.setSize(50,30);
130         lab2.setSize(50,30);
131         lab1.setLocation(70,130);
132         lab2.setLocation(70,180);
133         btn1 = new JButton("登录");
134         btn1.setBounds(100,230,180,50);
135         im1 = (new ImageIcon("QQ.png")).getImage(); //图标
136         this.setIconImage(im1);
137         //ImageIcon im2 = new ImageIcon("77.png"); //图标
138         im2 = new ImageIcon("./77.png");
139         btn1.setIcon(im2);
140         this.setLayout(null);  //布局--绝对布局
141         ltn = new MyListener();  //监听
142         this.addWindowListener(ltn);
143         act = new BtnAction();    //btn事件
144         btn1.addActionListener(act);
145         btn2 = new JButton("重置");
146         btn2.setBounds(300,230,100,50);
147         act2 = new BtnAction2();
148         btn2.addActionListener(act2);
149         //frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
150         this.setSize(425,325);
151         this.setLocation(700,500);
152         this.setTitle("QQ登录");
153         this.setResizable(false);        
154         this.add(btn1);
155         this.add(btn2);
156         this.add(lab1);
157         this.add(lab2);
158         this.add(jpf1);
159         this.add(jtf1);
160         this.add(background1);
161         this.add(background2);
162         this.setVisible(true);
163         System.out.println("OK");
164     }
165     public static void main(String[] args)
166     {
167         LoginFrame Event1 = new LoginFrame();
168         System.out.println("OK");
169     }
170 }
171 class RegsterFrame extends FixFrame
172 {
173     
174 }
175 class BackPswFrame extends FixFrame
176 {
177     
178 }
179 class MainFrame extends ResizableFrame
180 {
181     
182 }