import java.awt.Container;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
?
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
?
public class Test10_3 {
?? ?public static void main(String [] args){
?? ??? ?Denglu de = new Denglu();
?? ?}
}
?
class Denglu{
?? ?private JFrame jf = new JFrame("登陸窗口");
?? ?private JButton jb1 = new JButton("用戶名");
?? ?private JButton jb2 = new JButton("密碼");
?? ?private JButton jbLogin = new JButton("登陸");
?? ?private JButton jbquxiao = new JButton("取消");
?? ?private JTextField jtName = new JTextField();
?? ?private JTextField jtPwd = new JTextField();
?? ?private final String mima = "sss111";//此為預(yù)設(shè)的密碼
?? ?private int count = 0;
?? ?
?? ?private JFrame jfZhu = new JFrame();
?? ?ImageIcon image = new ImageIcon("C:\\Users\\sss\\Desktop\\index.jpg");//這為我的圖片路徑
?? ?private JLabel jlZhu = new JLabel(image);
?? ?
?? ?private JFrame jfCuo = new JFrame();
?? ?private JLabel jlCuo = new JLabel("你輸入的用戶名密碼不匹配！");
?
?? ?public Denglu(){
?? ??? ?Container cp = jf.getContentPane();
?? ??? ?cp.setLayout(null);
?? ??? ?
?? ??? ?jtName.setBounds(150,50,100,20);
?? ??? ?cp.add(jtName);
?? ??? ?jb1.setBounds(10,50,100,20);
?? ??? ?cp.add(jb1);
?
?? ??? ?jtPwd.setBounds(150,100,100,20);
?? ??? ?cp.add(jtPwd);
?? ??? ?jb2.setBounds(10,100,100,20);
?? ??? ?cp.add(jb2);
?? ??? ?
?? ??? ?jbLogin.setBounds(20, 150, 100, 20);
?? ??? ?jbquxiao.setBounds(150, 150, 100, 20);
?? ??? ?cp.add(jbLogin);
?? ??? ?cp.add(jbquxiao);
?? ??? ?
?? ??? ?jbquxiao.addActionListener(new ActionListener() {
?? ??? ??? ?
?? ??? ??? ?public void actionPerformed(ActionEvent e) {
?? ??? ??? ??? ?System.exit(0);
?? ??? ??? ?}
?? ??? ?});
?? ??? ?
?? ??? ?jbLogin.addActionListener(new ActionListener(){
?? ??? ??? ?
?? ??? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ??? ?String name = jtName.getText();
?? ??? ??? ??? ?String pwd = jtPwd.getText();
?? ??? ??? ??? ?String aa = name+pwd;
?? ??? ??? ??? ?if(aa.equals(mima)){?? ??? ??? ?//Java中判斷兩個(gè)字符串相等用equals()函數(shù)。
?? ??? ??? ??? ??? ?jf.dispose();?? ?//關(guān)閉登陸面板
?? ??? ??? ??? ??? ?Container cp2 = jfZhu.getContentPane();
?? ??? ??? ??? ??? ?cp2.setLayout(null);
?? ??? ??? ??? ??? ?
?? ??? ??? ??? ??? ?jlZhu.setBounds(0, 0, 400, 300);
?? ??? ??? ??? ??? ?cp2.add(jlZhu);
?? ??? ??? ??? ??? ?jfZhu.setSize(400,300);
?? ??? ??? ??? ??? ?jfZhu.setVisible(true);
?? ??? ??? ??? ?}
?? ??? ??? ??? ?else{
?? ??? ??? ??? ??? ?if(0<=count&&count<3){
?? ??? ??? ??? ??? ??? ?Container cp3 = jfCuo.getContentPane();
?? ??? ??? ??? ??? ??? ?cp3.setLayout(null);
?? ??? ??? ??? ??? ??? ?
?? ??? ??? ??? ??? ??? ?jlCuo.setBounds(0, 0, 400, 300);
?? ??? ??? ??? ??? ??? ?cp3.add(jlCuo);
?? ??? ??? ??? ??? ??? ?jfCuo.setSize(400,300);
?? ??? ??? ??? ??? ??? ?jfCuo.setVisible(true);
?? ??? ??? ??? ??? ??? ?count++;
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ??? ?else{
?? ??? ??? ??? ??? ??? ?if(count>=3)
?? ??? ??? ??? ??? ??? ??? ?System.exit(0);
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?}
?? ??? ??? ?}
?? ??? ?});
?? ??? ?
?? ??? ?jf.setSize(400, 300);
?? ??? ?jf.setVisible(true);
?? ??? ?
?? ?}
}