java程序返回用户名和密码).doc

最近在翻阅java基础知识的时候偶然间看到了jpassword的用法的介绍，然后写下了如下的这个demo，供参考，提供意见实现功能：当你输入用户名和密码后会返回一个窗体，有刚才输入的用户名和密码。代码如下所示：package ;/实现读取登录的密码和用户名import java.awt.Container;import java.awt.GridLayout;import java.awt.Label;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPasswordField;import javax.swing.JTextField;public class JpasswordField extends JFrame/* param args*/JTextField userName;JPasswordField password;JButton loginBtn;JButton cancelBtn;public JpasswordField()super(Jpassword的演示);Container container=getContentPane();container.setLayout(new GridLayout(3,2);userName=new JTextField(16);password=new JPasswordField(16);loginBtn=new JButton(登录);loginBtn.addActionListener(new ActionListener()public void actionPerformed(ActionEvent evt)char pw=password.getPassword();String message=您的用户名是：+userName.getText()+n您的密码是：+new String(pw);if(message=null)System.out.println(你需要输入用户名和密码);elseJOptionPane.showMessageDialog(JpasswordField.this, message););cancelBtn=new JButton(取消);cancelBtn.addActionListener(new ActionListener()public void actionPerform(ActionEvent evt)System.exit(0);Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubSystem.exit(0););container.add(new Label(userName：);container.add(userName);container.add(new Label(passWord：);container.add(password);container.add(loginBtn);container.add(cancelBtn);this.setSize(300,150);this.setLocation(400, 250);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setVisible(true);public static void main(String args) new JpasswordField();最近在翻阅java基础知识的时候偶然间看到了jpassword的用法的介绍，然后写下了如下的这个demo，供参考，提供意见实现功能：当你输入用户名和密码后会返回一个窗体，有刚才输入的用户名和密码。代码如下所示：package ;/实现读取登录的密码和用户名import java.awt.Container;import java.awt.GridLayout;import java.awt.Label;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPasswordField;import javax.swing.JTextField;public class JpasswordField extends JFrame/* param args*/JTextField userName;JPasswordField password;JButton loginBtn;JButton cancelBtn;public JpasswordField()super(Jpassword的演示);Container container=getContentPane();container.setLayout(new GridLayout(3,2);userName=new JTextField(16);password=new JPasswordField(16);loginBtn=new JButton(登录);loginBtn.addActionListener(new ActionListener()public void actionPerformed(ActionEvent evt)char pw=password.getPassword();String message=您的用户名是：+userName.getText()+n您的密码是：+new String(pw);if(message=null)System.out.println(你需要输入用户名和密码);elseJOptionPane.showMessageDialog(JpasswordField.this, message););cancelBtn=new JButton(取消);cancelBtn.addActionListener(new ActionListener()public void actionPerform(ActionEvent evt)System.exit(0);Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubSystem.exit(0););container.add(new Label(userName：);container.add(userName);container.add(new Label(passWord：);container.add(password);container.add(loginBtn);container.add(cancelBtn);this.setSize(300