高级语言案例分析_QQ_登录

package javaQQ;import java.awt.FlowLayout;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JPasswordField;import javax.swing.JTextField;import com.sun.org.apache.bcel.internal.generic.NEW;public class Load_QQ extends JFrame {User_QQ userQQ=new User_QQ();static String un;boolean Flag=false;private JLabel welcomela=null;private JLabel servela=null;private JLabel userla=null;private JLabel passwordla=null;private JTextField servejt=null;private JTextField userjt=null;private JPasswordField passwordjp=null;private JButton loadbtn=null;private JButton canclebtn=null;private JButton loginbtn=null;private JPanel inputJp=null;private JPanel btnJp=null;public Load_QQ(){super("用户登陆");init();}public void init(){inputJp=new JPanel();btnJp=new JPanel();this.setLayout(new FlowLayout());inputJp.setLayout(new GridLayout(3,2));welcomela=new JLabel("欢迎使用javaQQ");servela=new JLabel("服务器:");userla=new JLabel("用户名:");passwordla=new JLabel("密    码:");servejt=new JTextField("shenzhaowei_QQ");userjt=new JTextField(10);passwordjp=new JPasswordField(10);loadbtn=new JButton("登陆");canclebtn=new JButton("取消");loginbtn=new JButton("注册");inputJp.add(servela);inputJp.add(servejt);inputJp.add(userla);inputJp.add(userjt);inputJp.add(passwordla);inputJp.add(passwordjp);btnJp.add(loadbtn);btnJp.add(canclebtn);btnJp.add(loginbtn);this.add(welcomela);this.add(inputJp);this.add(btnJp);this.setSize(260,260);this.setVisible(true);this.show();loadbtn.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){String serveName=servejt.getText().trim();String userName=userjt.getText().trim();String passwordStr=passwordjp.getText().trim();int i;for(i=0;i<userQQ.userpasswordU.length;i++){System.out.println("userpasswordU:"+userQQ.userpasswordU[i]);System.out.println("passwordStr:"+passwordStr);if(userQQ.usernameU[i].equals(userName)){System.out.println("usernameU:"+userQQ.usernameU[i]);System.out.println("userName:"+userName);un=userQQ.usernameU[i];if(userQQ.userpasswordU[i].equals(passwordStr)){System.out.println("userpasswordU:"+userQQ.userpasswordU[i]);System.out.println("passwordStr:"+passwordStr);Flag=true;break;}}}System.out.println(Flag);System.out.print("un:"+un);if(Flag==true){close();Friend_QQ friendQQ=new Friend_QQ(un);}}});loginbtn.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){Login_QQ lg=new Login_QQ();close();}});this.setDefaultCloseOperation(EXIT_ON_CLOSE);canclebtn.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){System.exit(0);}});}public void close(){this.dispose();}public static void main(String args[]){Load_QQ ld=new Load_QQ();}}