Java Gui弹窗 java点击按钮弹窗

1 import javax.swing.*; 2 import java.awt.event.*; 3 import java.awt.*; 4  5 public class ShowDIalog extends JFrame{ 6     JButton button=new JButton(显示”); 7     public ShowDIalog(){ 8     setLayout(new FlowLayout()); 9     add(button);10     button.addActionListener(new ActionListener(){11         public void actionPerformed(ActionEvent e){12             JOptionPane.showMessageDialog(null,"Wath a fucking day!");13         }14     });15     setVisible(true);16     setSize(100,100);17 }18    public static void main(String[] args){19        ShowDIalog s=new ShowDIalog();20     }21 }

在按钮上添加一个监听器

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当程序运行时，弹出一个提示框来显示极端条。

初始用户ID和密码设置为123。正确的密码后，正在登录的提示框出现。登录成功后，关闭提示并退出程序。

1 import java.awt.*;  2 import javax.swing.*;  3 import java.awt.event.*;  4   5 public class Test extends JFrame implements ActionListener,Runnable {  6       7     JLabel jlabel1 = new JLabel();  8   9     JLabel jlabel2 = new JLabel(); 10  11     JTextField jtUserID = new JTextField(); 12  13     JLabel jlabel3 = new JLabel(); 14  15     JPasswordField jpUsePwd = new JPasswordField(); 16  17     JButton jbEnter = new JButton(); 18  19     JButton jbExit = new JButton(); 20      21     ///设置登录用户名和密码 22      23     String userID="123"; 24     String userPwd="123"; 25      26     public Test() { 27         super(“用户登录界面”); 28         try { 29             // 设置窗体的大小、位置和可见性 30  31             jbInit(); 32             this.setVisible(true); 33             this.setSize(410, 300); 34             this.addWindowListener(new WindowAdapter() { // 清空内存 35                         public void windowClosing(WindowEvent e) { 36                             System.exit(0); 37                         } 38                     }); 39         } catch (Exception exception) { 40             exception.printStackTrace(); 41         } 42     } 43  44     private void jbInit() throws Exception { 45         // 各种控件的初始化，在面板上设置控件位置，并在面板上添加控件 46         getContentPane().setLayout(null); 47         jtUserID.setText(""); 48         jtUserID.setBounds(new Rectangle(182, 50, 141, 22)); 49         jlabel2.setText(用户名：; 50         jlabel2.setBounds(new Rectangle(83, 50, 78, 24)); 51         jlabel3.setText("密    码："); 52         jlabel3.setBounds(new Rectangle(81, 91, 78, 24)); 53         jpUsePwd.setBounds(new Rectangle(182, 92, 140, 27)); 54         jbEnter.setBounds(new Rectangle(122, 197, 90, 25)); 55         jbEnter.setText(“登陆”; 56         jbExit.setBounds(new Rectangle(217, 197, 90, 25)); 57         jbExit.setText(退出); 58         this.getContentPane().add(jlabel2); 59         this.getContentPane().add(jlabel3); 60         this.getContentPane().add(jlabel1); 61         this.getContentPane().add(jtUserID); 62         this.getContentPane().add(jpUsePwd); 63         this.getContentPane().add(jbEnter); 64         this.getContentPane().add(jbExit); 65  66         jbEnter.addActionListener(this); 67         jbExit.addActionListener(this); 68  69     } 70  71  72 //多线程控制登录信息框 73     public void run(){ 74         try{ 75         this.setVisible(false); 76         JOptionPane.showMessageDialog(null, “正在登陆..."); 77         Thread.sleep(3000); 78         this.dispose(); 79         }catch(Exception e){ 80             System.out.println(e); 81         } 82          83     } 84  85 ///点击按钮时触发以下方法 86     public void actionPerformed(ActionEvent e) { 87         try{ 88         String command=e.getActionCommand(); 89         if (command.equals(“退出”) { 90             System.exit(0); 91         } else { 92  93             // 实现管理员登录功能 94  95             if (jtUserID.getText().equals("") 96                     || new String(jpUsePwd.getPassword()).equals("")) { 97                 JOptionPane.showMessageDialog(null, “请输入完整数据”; 98             } else { 99                         if (jtUserID.getText().equals(userID)100                                 && new String(jpUsePwd.getPassword())101                                         .equals(userPwd)) {102                             Thread t=new Thread(this);103                             t.start();104                             105                         106 107                         }108                      else {109                         JOptionPane.showMessageDialog(null, “帐号或密码错误”;110                         jtUserID.setText("");111                         jpUsePwd.setText("");112                         }113                         }114             }115         }catch(Exception ex){116             System.out.println(ex);117         }118         }119     public static void main(String[] args) {120          new Test();121     }122 }

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