简单的登录系统界面
代码如下：
package denglujiemian1.text1; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.*; import java.math.*; import java.util.Random; public class Login1 extends JFrame implements ActionListener{ private JLabel user,password,check,user0,password0; private JTextField word1,word2,word3; private JPasswordField word4,word5; private Button login,register,checkbutton,yes; private JFrame background1,background2; static String num; static String zhanghao[]=new String[10],mima[]=new String[10]; static int flag=1; static int flag1=1; static int flag2=1; static int flag3=1; static int sum=0; public static void main(String[] args) { Login1 deng= new Login1(); deng.showTime(); } public void showTime() { //总的框 background1 = new JFrame(); background1.setTitle("登录界面"); background1.setLayout(null);//居中 //账号输入 user =new JLabel("账号"); word1=new JTextField("",15); //设置“账号”以及输入框的位置 user.setBounds(70, 13, 60, 40); word1.setBounds(110, 20, 210, 25); word1.addActionListener(this); background1.add(user); background1.add(word1); //密码输入 password = new JLabel("密码"); word4 = new JPasswordField("",15); password.setBounds(70, 53, 60, 40); word4.setBounds(110, 60, 210, 25); background1.add(password); background1.add(word4); //验证码输入 check=new JLabel("验证码"); word2 = new JTextField("",10); check.setBounds(58, 93, 60, 40); word2.setBounds(110, 100, 100, 25); background1.add(check); background1.add(word2); //验证码数字 checkButton(); background1.add(checkbutton); //设置登录按钮 login = new Button("登录"); login.setBackground(Color.orange); login.setBounds(80, 150, 240, 40); login.addActionListener(this); background1.add(login); //设置注册按钮 register = new Button("注册"); register.setBackground(Color.orange); register.setBounds(80, 205, 240, 40); register.addActionListener(this); background1.add(register); background1.setVisible(true); background1.setSize(400, 300); background1.setLocationRelativeTo(null); background1.setResizable(false); background1.setDefaultCloseOperation(3); } public String checkNumber() { Random a=new Random(); Random b=new Random(); Random c=new Random(); Random d=new Random(); int a1,a2,a3,a4; a1=a.nextInt(10); a2=a.nextInt(10); a3=a.nextInt(10); a4=a.nextInt(10); num=a1+""+a2+a3+a4; return num; } public void checkButton() { num=checkNumber(); checkbutton=new Button(num); checkbutton.setBounds(240, 100, 80, 25); checkbutton.setBackground(Color.gray); checkbutton.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { if(e.getButton()== MouseEvent.BUTTON1) { checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } } }); } public void showTime2() { JFrame background2=new JFrame(); background2.setTitle("注册界面"); background2.setLayout(null);//居中 //账号设置 user0 = new JLabel("账号"); word3 = new JTextField("",15); user0.setBounds(100, 13, 60, 40); word3.setBounds(140, 20, 120, 25); word3.addActionListener(this); background2.add(user0); background2.add(word3); //密码设置 password0 = new JLabel("密码"); word5 =new JPasswordField("",15); password0.setBounds(100, 53, 60, 40); word5.setBounds(140, 60, 120, 25); background2.add(password0); background2.add(word5); //确定按钮 yes = new Button("确定"); yes.setBackground(Color.orange); yes.setBounds(75, 125, 240, 40); yes.addActionListener(this); yes.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { if (e.getButton() == MouseEvent.BUTTON1) { if(!word3.getText().equals("")&&!word5.getText().equals("")) { flag=1; for(int j=0;j<sum;j++) { if(zhanghao[j].contentEquals(word3.getText()))flag=0; } if(flag==1) { zhanghao[sum]=word3.getText(); mima[sum]=word5.getText(); sum++; JOptionPane.showMessageDialog(null, "注册成功！"); background2.setVisible(false); } else { word3.setText(""); word5.setText(""); JOptionPane.showMessageDialog(null, "该账号已存在！"); } } else { word3.setText(""); word5.setText(""); JOptionPane.showMessageDialog(null, "请输入完整信息！"); } } } }); background2.add(yes); background2.setVisible(true); background2.setSize(400, 250); background2.setLocationRelativeTo(null); background2.setResizable(false); } public void actionPerformed(ActionEvent e) { if(e.getActionCommand()=="登录") { flag1=0; flag2=1; flag3=1; num=checkNumber(); for(int i=0;i<sum;i++) { if(word1.getText().contentEquals(zhanghao[i])) { flag1=1; } if(word1.getText().contentEquals(zhanghao[i])&&!word4.getText().contentEquals(mima[i])) { flag2=0; } if(word1.getText().contentEquals(zhanghao[i])&&word4.getText().contentEquals(mima[i])&&num.equals(word2.getText())) { flag3=0; } } if(word1.getText().equals("")) { JOptionPane.showMessageDialog(null,"请输入用户名！"); word1.setText(""); word4.setText(""); word2.setText(""); checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } else if(word4.getText().contentEquals("")) { JOptionPane.showMessageDialog(null,"请输入密码！"); word1.setText(""); word4.setText(""); word2.setText(""); checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } else if(word2.getText().contentEquals("")) { JOptionPane.showMessageDialog(null,"请输入验证码！"); word1.setText(""); word4.setText(""); word2.setText(""); checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } else if(flag1==0) { JOptionPane.showMessageDialog(null,"用户不存在！"); word1.setText(""); word4.setText(""); word2.setText(""); checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } else if(flag2==0) { JOptionPane.showMessageDialog(null,"密码输入错误！"); word1.setText(""); word4.setText(""); word2.setText(""); checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } else if(flag3==0) { JOptionPane.showMessageDialog(null,"验证码输入错误！"); word1.setText(""); word4.setText(""); word2.setText(""); checkbutton.setVisible(false); checkButton(); background1.add(checkbutton); } else { JOptionPane.showMessageDialog(null, "登陆成功！"); } } else if(e.getActionCommand()=="注册") { showTime2(); } } }
运行截图如下：
