login.java

Java开发初始的ATM机登录代码 package myframe; import income.CardArray; import java.awt.Color; import java.awt.Container; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.Iterator; import javax.swing.ImageIcon; 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 bean.Card; public class Login extends JFrame{ JTextField tfNum; JPasswordField tfPwd; JButton btOk; JButton btCancel; JPanel panelTake; String num; String pwd; int count;//输错密码次数 boolean isRealCard;//是否合法账号 public void init(){ Container container=this.getContentPane(); panelTake = new JPanel(null); panelTake.setOpaque(false); ((JPanel)this.getContentPane()).setOpaque(false); ImageIcon m=new ImageIcon("image//denglu.jpg"); JLabel background = new JLabel(m); this.getLayeredPane().add(background ,new Integer(Integer.MIN_VALUE ) ); background.setBounds(0,0,m.getIconWidth(), m.getIconHeight()); JLabel lNum=new JLabel("账号"); JLabel lPwd=new JLabel("密码"); tfNum=new JTextField(); tfPwd=new JPasswordField(); tfPwd.setEchoChar('*'); btOk=new JButton("登录"); btCancel=new JButton("退出"); panelTake.add(lNum); lNum.setBounds(70, 30, 100, 30); panelTake.add(tfNum); tfNum.setBounds(120, 30, 200, 30); panelTake.add(lPwd); lPwd.setBounds(70, 80, 100, 30); panelTake.add(tfPwd); tfPwd.setBounds(120, 80, 200, 30); panelTake.add(btOk); btOk.setBounds(70, 160, 100, 30); panelTake.add(btCancel); btCancel.setBounds(240, 160, 100, 30); container.add(panelTake); this.setBounds(400,200,400,250); this.setTitle("ATM自助取款机"); this.setVisible(true); this.setResizable(false); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //注册监听 btOk.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent arg0) { // TODO Auto-generated method stub num=tfNum.getText(); pwd=new String(tfPwd.getPassword()); //和账户集合进行匹配 CardArray.init(); Iterator<Card> itr=CardArray.al.iterator();//迭代器 Card myCard=null; while(itr.hasNext()){ myCard=itr.next();//得到集合的当前元素 if(num.equals(myCard.getNum())){ isRealCard=true; break; } } if(isRealCard){ if(pwd.equals(myCard.getPwd())){ Login.this.dispose(); MainFrame mf=new MainFrame(myCard); mf.init(); }else{ count++; tfPwd.setText(""); pwd=""; JOptionPane.showMessageDialog(null, "密码错误，请重新输入！"); if(count==3){ tfNum.setText(""); tfPwd.setText(""); num=""; pwd=""; JOptionPane.showMessageDialog(null, "密码三次输入错误，吞卡！"); } } }else{ tfNum.setText(""); tfPwd.setText(""); num=""; pwd=""; JOptionPane.showMessageDialog(null, "对不起，您拿错卡了！"); } } }); } public static void main(String args[]){ new Login().init(); } }