Java小型银行管理系统源代码（图形界面）accounts.javapackage Account;public class accounts {protected int id;//银行账号protected String password;//用户密码protected String name;//用户型号protected String personId;//身份账号protected int accountType;//账号类型，0代表储蓄卡，1代表信用卡protected double balance;//账户余额。

之所以定义为protected是让他的子类可以直接用，不需要通过方法来赋值。

protected double ceiling;public String getPassword(){return password;}public void setPassword(String password){this.password=password;}public String getName(){return name;}public void setName(String name){=name;}public String getPersonId(){return personId;}public void setPersonId(String personId){this.personId=personId;}public int getAccountType(){return accountType;}public void setAccountType(int accountType){this.accountType=accountType;}public double getBalance(){return balance;}public void setBalance(double balance){this.balance=balance;}public int getId(){return id;}public void setId(int id){this.id=id;}public double getCeiling(){return ceiling;}public void setCeiling(double ceiling){this.ceiling=ceiling;}//无参数构造方法public accounts(){}//构造方法public accounts(String password,String name,String personId,int accountType, double balance,double ceiling){super();this.password=password;=name;this.personId=personId;this.accountType=accountType;this.balance=balance;this.ceiling=ceiling;}//存款public void deposit(double money){balance+=money;}//取款public void withdraw(double money){if(accountType==1){if((balance+ceiling)<money){System.out.println("对不起，已超出您的信用额度！");}else{balance-=money;}}else{if(balance<money){System.out.println("对不起，账户余额不足！");}else{balance-=money;}}}}DBoper.javapackage DB;import java.sql.*;import java.util.ArrayList;import Account.accounts;public class DBoper {private Connection conn = null;private Statement st = null;private PreparedStatement pstmt = null;private ResultSet rs = null;private ArrayList<accounts> result;//连接数据库public Connection getConnection(){try{Class.forName(".mysql.jdbc.Driver");conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/bankmanager?u seUnicode=true&characterEncoding=utf8","root","xuewei");}catch(Exception e){System.out.println("数据库连接失败");}return conn;}//修改删除用户数据public boolean accountDataUpdate(String sql){conn=getConnection();try{pstmt=conn.prepareStatement(sql);pstmt.executeUpdate();//System.out.println("数据更新成功");conn.close();return true;}catch(SQLException e){e.printStackTrace();//System.out.println("更新失败");return false;}}//依据id来修改记录public boolean dataupdateid(accounts user, int id) {conn = getConnection();try {String sql = "update account set username=?,userpwd=?,personId=?,accountType=?,balance=?,ceiling=? where id="+ id;pstmt = conn.prepareStatement(sql);pstmt.setString(1, user.getName());pstmt.setString(2, user.getPassword());pstmt.setString(3, user.getPersonId());pstmt.setInt(4, user.getAccountType());pstmt.setDouble(5, user.getBalance());pstmt.setDouble(6, user.getCeiling());pstmt.executeUpdate();System.out.println("操作成功");return true;}catch (SQLException e) {e.printStackTrace();System.out.println("操作失败");return false;}}//插入用户数据public boolean accountDataInsert(accounts account){conn=getConnection();try{pstmt=conn.prepareStatement("insert into account (username,userpwd,personId,accountType,balance,ceiling) values (?,?,?,?,?,?)");pstmt.setString(1, account.getName());pstmt.setString(2, account.getPassword());pstmt.setString(3, account.getPersonId());pstmt.setInt(4, account.getAccountType());pstmt.setDouble(5, account.getBalance());pstmt.setDouble(6, account.getCeiling());pstmt.executeUpdate();System.out.println("新用户数据插入成功");conn.close();return true;}catch(SQLException e){e.printStackTrace();System.out.println("插入失败");return false;}}//查询数据public ResultSet dataquery(String sql) {conn = getConnection();try {pstmt = conn.prepareStatement(sql);rs = pstmt.executeQuery();}catch (SQLException e) {e.printStackTrace();System.out.println("检索失败");}return rs;}public ResultSet testlist() {try {String sql = "select * from account where id =1001";pstmt = conn.prepareStatement(sql);System.out.println(sql);rs = pstmt.executeQuery();} catch (SQLException e) {e.printStackTrace();System.out.println("检索失败");}return rs;}public ArrayList<accounts> testt(int id) {ArrayList<accounts> list = new ArrayList<accounts>();conn = getConnection();try {String sql = "select * from account where id=" + id;pstmt = conn.prepareStatement(sql);rs = pstmt.executeQuery();while (rs.next()) {accounts user = new accounts();user.setName(rs.getString("username"));user.setPassword(rs.getString("userpwd"));user.setPersonId(rs.getString("personId"));user.setAccountType(rs.getInt("accountType"));user.setBalance(rs.getDouble("balance"));user.setCeiling(rs.getDouble("ceiling"));list.add(user);}}catch (SQLException e) {e.printStackTrace();System.out.println("检索失败");}return list;}//根据卡号和密码验证用户是否存在public boolean verify(int id,String password){conn=getConnection();try{pstmt=conn.prepareStatement("select * from account where id=? and userpwd=?");pstmt.setInt(1, id);pstmt.setString(2, password);rs=pstmt.executeQuery();if(rs.next()){return true;}else{return false;}}catch(SQLException e){e.printStackTrace();return false;}}/*** 登录验证*/public accounts verifyAccount(int id, String password) {boolean flag = verify(id, password);if(flag){accounts account=queryByIDandPassword(id, password);return account;}else{System.out.println("用户不存在！");return null;}}//根据卡号和密码查询信息public accounts queryByIDandPassword(int id,String password){conn=getConnection();try{pstmt=conn.prepareStatement("select * from account where id=? and userpwd=?");pstmt.setInt(1, id);pstmt.setString(2, password);rs=pstmt.executeQuery();accounts account=new accounts();while(rs.next()){account.setId(rs.getInt("id"));account.setName(rs.getString("username"));account.setPassword(rs.getString("userpwd"));account.setPersonId(rs.getString("personId"));account.setAccountType(rs.getInt("accountType"));account.setBalance(rs.getDouble("balance"));account.setCeiling(rs.getDouble("ceiling"));}return account;}catch(SQLException e){e.printStackTrace();return null;}}//根据卡号查询信息public accounts queryByID(int id){conn=getConnection();try{pstmt=conn.prepareStatement("select * from account where id=?");pstmt.setInt(1, id);rs=pstmt.executeQuery();accounts account=new accounts();while(rs.next()){account.setId(rs.getInt("id"));account.setName(rs.getString("username"));account.setPassword(rs.getString("userpwd"));account.setPersonId(rs.getString("personId"));account.setAccountType(rs.getInt("accountType"));account.setBalance(rs.getDouble("balance"));account.setCeiling(rs.getDouble("ceiling"));}return account;}catch(SQLException e){e.printStackTrace();return null;}}public static void main(String[] args) {// TODO Auto-generated method stubDBoper op=new DBoper();ArrayList<accounts> list=op.testt(1001);for(int i=0;i<list.size();i++){accounts user=new accounts();user=list.get(i);System.out.println(user.getName());System.out.println(user.getPassword());System.out.println(user.getPersonId());System.out.println(user.getAccountType());System.out.println(user.getBalance());System.out.println(user.getCeiling());}}}//图像界面文件夹DN_SYSTEMDefault.java //主界面package DN_SYSTEM;import java.awt.Color;import java.awt.Container;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.WindowConstants;import Account.accounts;import DB.DBoper;public class Default extends JFrame implements ActionListener{accounts account=DN_ATM.client;DBoper db=new DBoper();private JFrame jf;private JButton btn0,btn1,btn2,btn3,btn4,btn5;private Container c;public void defaltDemo() {//添加主界面卡片//DN_ATM.id;int id=DN_ATM.id;//account=db.queryByID(id);jf=new JFrame("DEFAULT");c=jf.getContentPane();c.setLayout(null);c.setBackground(new Color(119,119,253));JLabel lblwel = new JLabel("欢迎"+account.getName()+"用达能银行ATM系统");lblwel.setBounds(20, 15, 350, 30);c.add(lblwel);JLabel lblwel1 = new JLabel("请选择您需要的交易类型");lblwel1.setBounds(120, 45, 350, 30);c.add(lblwel1);btn1 = new JButton("取款服务");btn1.addActionListener(this);btn1.setBounds(70, 90, 100, 30);c.add(btn1);btn2=new JButton("存款服务");btn2.addActionListener(this);btn2.setBounds(210, 90, 100, 30);c.add(btn2);btn3 = new JButton("查询余额");btn3.addActionListener(this);btn3.setBounds(70, 150, 100, 30);c.add(btn3);btn4 = new JButton("转账服务");btn4.addActionListener(this);btn4.setBounds(210, 150, 100, 30);c.add(btn4);btn5 = new JButton("注销账户");btn5.addActionListener(this);btn5.setBounds(70, 210, 100, 30);c.add(btn5);btn0 = new JButton("退出操作");btn0.addActionListener(this);btn0.setBounds(210, 210, 100, 30);c.add(btn0);jf.setVisible(true);jf.setResizable(false);jf.setSize(400,300);jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}//事件处理Overridepublic void actionPerformed(ActionEvent e){//取款服务if(e.getSource().equals(btn1)){OutMoney outmoney=new OutMoney();outmoney.outMoney();jf.dispose();}//存款服务if(e.getSource().equals(btn2)){InMoney inmoney=new InMoney();inmoney.InMoney();jf.dispose();}//查询余额if(e.getSource().equals(btn3)){GetBalance getbalance=new GetBalance();getbalance.getBalance();jf.dispose();//转账服务if(e.getSource().equals(btn4)){TransferAccounts tranfer=new TransferAccounts();tranfer.transferAccounts();jf.dispose();}//注销账户if(e.getSource().equals(btn5)){String sql="delete from account where id="+account.getId();boolean flag=db.accountDataUpdate(sql);if(flag){JOptionPane.showMessageDialog(this,"注销成功！");}else{JOptionPane.showMessageDialog(this, "注销失败！");}}if(e.getSource().equals(btn0)){System.exit(0);}}public static void main(String[] args) {// TODO Auto-generated method stubDefault defaults=new Default();defaults.defaltDemo();}}DN_ATM.java //功能界面package DN_SYSTEM;import java.awt.CardLayout;import java.awt.Color;import java.awt.Container;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.AbstractButton;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 DB.DBoper;import Account.accounts;public class DN_ATM extends JFrame implements ActionListener{ private JLabel lbljixu;private JButton btngetcard;private JButton btncard,btn010,btn_addAccount,btnsure,btnback;private JTextField txt1;private JPasswordField txt2;private Container container;private CardLayout Layout;private JLabel lblwrong;private JPanel panelfirst,panelmain;public static int id;static accounts client = null;public DN_ATM(){super("达能银行");this.setSize(435, 350);this.setLocation(500,250);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置不可改变窗口大小this.setResizable(false);}//布局public void setLayout(){//用卡片布局Layout = new CardLayout();container = getContentPane();container.setLayout(Layout);//添加第一卡片panelfirst = new JPanel(null);//设置卡片的背景颜色panelfirst.setBackground(new Color(119,119,253));lbljixu = new JLabel("请放入磁卡，然后继续操作");//设置卡片在Panel中的位置lbljixu.setBounds(140, 90, 350, 30);//为第一卡片添加一个Labelpanelfirst.add(lbljixu);//为第一卡片添加一个按钮btncard = new JButton("继续");btncard.setBounds(310, 180, 80, 30);//为按钮注册事件监听器btncard.addActionListener(this);//开始时设置按钮不可按btncard.setEnabled(false);panelfirst.add(btncard);//为第一卡片添加一个按钮btngetcard = new JButton("取卡");btngetcard.setEnabled(false);btngetcard.setBounds(310, 220, 80, 30);btngetcard.addActionListener(this);panelfirst.add(btngetcard);//添加登录输入卡片panelmain = new JPanel(null);panelmain.setBackground(new Color(119,119,253));//添加登录输入卡号JLabel lblnumber = new JLabel("请输入您的银行卡卡号："); panelmain.add(lblnumber);lblnumber.setBounds(30, 30, 150, 30);//设置文本框为密码型txt1 = new JTextField(12);//文本框不可选中//txt1.enable(false);panelmain.add(txt1);txt1.setBounds(170, 30, 200, 30);JLabel lblpwd = new JLabel("请输入您的银行卡密码："); panelmain.add(lblpwd);lblpwd.setBounds(30, 80, 150, 30);//设置文本框为密码型txt2 = new JPasswordField(12);//文本框不可选中//txt2.enable(false);panelmain.add(txt2);//文本框的输入容用*显示txt2.setEchoChar('*');txt2.setBounds(170, 80, 200, 30);//添加选择按钮btnsure = new JButton("确定");btnsure.addActionListener(this);panelmain.add(btnsure);btnsure.setBounds(70, 160, 80, 30);//添加重输按钮btn010 = new JButton("重输");btn010.addActionListener(this);panelmain.add(btn010);btn010.setBounds(175,160,80,30);btnback = new JButton("退出");btnback.addActionListener(this);panelmain.add(btnback);btnback.setBounds(280, 160, 80, 30);//开户btn_addAccount = new JButton("开户");btn_addAccount.setBounds(70, 220, 80, 30);btn_addAccount.addActionListener(this);panelmain.add(btn_addAccount);lblwrong = new JLabel("请注意保护好您的密码！");panelmain.add(lblwrong);lblwrong.setBounds(180, 110, 200, 30);container.add(panelmain, "main");}//事件处理SuppressWarnings("deprecation")Overridepublic void actionPerformed(ActionEvent e){DBoper db=new DBoper();if(e.getSource().equals(btn_addAccount)){OpenAccount open=new OpenAccount();open.adduser();}//磁卡插入后，验证银行登录卡号与密码if(e.getSource().equals(btnsure)){client = db.verifyAccount(Integer.parseInt(txt1.getText()), txt2.getText());if(client!=null){Default defa=new Default();defa.defaltDemo();this.dispose();id=Integer.parseInt(txt1.getText());txt1.setText("");txt2.setText("");}else{lblwrong.setText("卡号或密码不正确，请重新输入！");txt1.setText("");txt2.setText("");}}//重置输入卡号和密码if(e.getSource()==btn010){txt1.setText("");txt2.setText("");lblwrong.setText("请注意保护好您的密码！");}//退出if(e.getSource().equals(btnback)){System.exit(0);}}public static void main(String[] args) {// TODO Auto-generated method stubDN_ATM ATM=new DN_ATM();ATM.setLayout();ATM.setVisible(true);}}GetBalance.java //查询余额package DN_SYSTEM;import java.awt.CardLayout;import java.awt.Color;import java.awt.Container;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.JPanel;import javax.swing.WindowConstants;import Account.accounts;import DB.DBoper;public class GetBalance extends JFrame implements ActionListener{ private JFrame jf;private Container c;private JLabel lblremain1,lblremain;private JButton btnremain,btnremain1;accounts account=new accounts();DBoper db=new DBoper();private int id=DN_ATM.id;//添加查询余额界面卡片public void getBalance(){account=db.queryByID(id);jf=new JFrame("FIND DALANCE");c=jf.getContentPane();c.setLayout(null);jf.setResizable(false);c.setBackground(new Color(119,119,253));lblremain1 = new JLabel("尊敬的达能用户您好！");lblremain1.setBounds(90,70,350,30);c.add(lblremain1);lblremain = new JLabel("请点击继续操作查询余额：");lblremain.setBounds(90,110,350,30);c.add(lblremain);btnremain = new JButton("继续操作");btnremain.setBounds(95,150,90,30);btnremain.addActionListener(this);c.add(btnremain);btnremain1 = new JButton("退出操作");btnremain1.setBounds(200,150,90,30);btnremain1.addActionListener(this);c.add(btnremain1);jf.setVisible(true);jf.setSize(400,300);jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}Overridepublic void actionPerformed(ActionEvent e){//查询余额if(e.getSource()==btnremain){lblremain1.setText("卡号:"+account.getId()+" 用户名:"+account.getName());lblremain.setText("您的余额为"+account.getBalance()+"元,是否继续操作?");}if(e.getSource()==btnremain1){Default defa=new Default();defa.defaltDemo();jf.dispose();}}public static void main(String[] args) {// TODO Auto-generated method stubGetBalance balance=new GetBalance();balance.getBalance();}}InMoney.java //存款package DN_SYSTEM;import java.awt.CardLayout;import java.awt.Color;import java.awt.Container;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.JTextField;import javax.swing.WindowConstants;import Account.accounts;import DB.DBoper;public class InMoney extends JFrame implements ActionListener{private JLabel lblsave,lblsave1;private JButton btnsave,btnsave2;private JTextField txt2;private double savemoney ;private double lastmoney;private boolean flag;private JFrame jf;private Container c;accounts account=new accounts();DBoper db=new DBoper();private int id=DN_ATM.id;public void InMoney(){account=db.queryByID(id);jf=new JFrame("IN MONEY");c=jf.getContentPane();c.setLayout(null);jf.setResizable(false);//添加存款显示界面卡片c.setBackground(new Color(119,119,253));lblsave = new JLabel("请在存款口处放入存款");lblsave.setBounds(60,30,350,30);c.add(lblsave);lblsave1 = new JLabel("请注意:只接收100元或100元的整数倍存款");lblsave1.setBounds(90,110,350,30);c.add(lblsave1);txt2 = new JTextField(12);c.add(txt2);txt2.setBounds(95, 80, 200, 30);btnsave = new JButton("放入存款完毕");btnsave.setBounds(90,160,120,30);btnsave.addActionListener(this);c.add(btnsave);btnsave2 = new JButton("返回");btnsave2.setBounds(240,160,60,30);btnsave2.addActionListener(this);c.add(btnsave2);jf.setVisible(true);jf.setSize(400,300);jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}Overridepublic void actionPerformed(ActionEvent e){if(e.getSource()==btnsave){savemoney=Double.parseDouble(txt2.getText());lastmoney=account.getBalance();lastmoney+=savemoney;String sql = "update account set balance="+lastmoney+"where id="+ id;flag=db.accountDataUpdate(sql);if(flag){JOptionPane.showMessageDialog(this, "存款成功！");txt2.setText("");Default defa=new Default();defa.defaltDemo();jf.dispose();}else{JOptionPane.showMessageDialog(this, "存款失败！");}}if(e.getSource()==btnsave2){Default defa=new Default();defa.defaltDemo();jf.dispose();}}public static void main(String[] args) {// TODO Auto-generated method stubInMoney inmoney=new InMoney();inmoney.InMoney();}}OpenAccount.java //开户package DN_SYSTEM;import ponent;import java.awt.Container;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.ButtonGroup;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPasswordField;import javax.swing.JRadioButton;import javax.swing.JTextField;import javax.swing.WindowConstants;import DB.DBoper;import Account.accounts;public class OpenAccount extends JFrame implements ActionListener{private JFrame jf;private Container c;private JTextField txtname,txt_personId;private JPasswordField txtpwd,txtpwd1;private JRadioButton rbt1;private JRadioButton rbt2;String accountType;//开户，增加新用户public void adduser(){jf=new JFrame("Open Account");c=jf.getContentPane();c.setLayout(null);jf.setResizable(false);JLabel lbname=new JLabel("用户名：");lbname.setBounds(100, 40, 80, 20);txtname=new JTextField();txtname.setBounds(160, 40, 130, 20);c.add(lbname);c.add(txtname);JLabel lbpwd=new JLabel("密码：");lbpwd.setBounds(110, 65, 80, 20);txtpwd=new JPasswordField();txtpwd.setBounds(160, 65, 130, 20);txtpwd.setEchoChar('*');c.add(lbpwd);c.add(txtpwd);JLabel lbpwd1=new JLabel("确认密码：");lbpwd1.setBounds(86, 90, 80, 20);txtpwd1 = new JPasswordField();txtpwd1.setBounds(160, 90, 130, 20);txtpwd1.setEchoChar('*');c.add(lbpwd1);c.add(txtpwd1);JLabel lbpersonId=new JLabel("号：");lbpersonId.setBounds(86, 115, 80, 20);txt_personId = new JTextField();txt_personId.setBounds(160, 115, 130, 20);c.add(lbpersonId);c.add(txt_personId);JLabel lbtype=new JLabel("账户类型：");lbtype.setBounds(86, 120, 80, 60);rbt1=new JRadioButton("信用卡");rbt1.setBounds(160, 135, 70, 30);rbt2=new JRadioButton("储蓄卡");rbt2.setBounds(225, 135, 70, 30);ButtonGroup group=new ButtonGroup();group.add(rbt2);group.add(rbt1);c.add(lbtype);c.add(rbt2);c.add(rbt1);JButton btnsubmit=new JButton("提交");btnsubmit.setBounds(100, 190, 80, 20);JButton btnreset=new JButton("重置");btnreset.setBounds(205, 190, 80, 20);c.add(btnsubmit);c.add(btnreset);btnsubmit.addActionListener(this);btnreset.addActionListener(this);jf.setVisible(true);jf.setSize(400,300);jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}public static void main(String[] args) {// TODO Auto-generated method stubOpenAccount openA=new OpenAccount();openA.adduser();}Overridepublic void actionPerformed(ActionEvent e){accounts account=new accounts();account.setName(txtname.getText());if(txtpwd.getText().equals(txtpwd1.getText())){account.setPassword(txtpwd.getText());}else{JOptionPane.showMessageDialog(this,"两次输入的密码不一致，请重新输入！");}account.setPersonId(txt_personId.getText());if(rbt1.isSelected())accountType="1";if(rbt2.isSelected())accountType="0";account.setAccountType(Integer.parseInt(accountType));account.setBalance(0);if(accountType.equals("1")){account.setCeiling(5000.0);}else{account.setCeiling(0);}DBoper db=new DBoper();if(db.accountDataInsert(account)){JOptionPane.showMessageDialog(this,"开户成功！");jf.dispose();//关闭当前登录窗体return;}else{JOptionPane.showMessageDialog(this,"开户失败！");return;}}}OutMoney.java //取款package DN_SYSTEM;import java.awt.CardLayout;import java.awt.Color;import java.awt.Container;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.WindowConstants;import Account.accounts;import DB.DBoper;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class OutMoney extends JFrame implements ActionListener{private JFrame jf;private JButton btn100,btn200,btn300,btn500,btn1000;private JButton btn001,btn002,btn003,btn004,btn005,btn006,btn007,btn008,btn009,btn000;private JButton btnsure1,btn0010,btnback2;private JTextField txt2;private Container c;private JLabel lblqukuan;private int money;private double lastmoney;accounts account=new accounts();DBoper db=new DBoper();private int id=DN_ATM.id;public void outMoney(){account=db.queryByID(id);jf=new JFrame("OUT MONEY");c=jf.getContentPane();c.setLayout(null);jf.setResizable(false);//添加取款页面卡片//panel4=new JPanel(null);c.setBackground(new Color(119,119,253));lblqukuan = new JLabel("请输入您的取款金额：");c.add(lblqukuan);lblqukuan.setBounds(115, 20, 150, 30);lblqukuan=new JLabel("提示：只能是100元或100元的整数倍");c.add(lblqukuan);lblqukuan.setBounds(115, 50, 300, 30);txt2 = new JTextField(12);txt2.enable(false);c.add(txt2);txt2.setBounds(115, 90, 200, 30);btn100 = new JButton("100");c.add(btn100);btn100.addActionListener(this);btn100.setBounds(45, 190, 60, 30);btn200 = new JButton("200");c.add(btn200);btn200.addActionListener(this);btn200.setBounds(115, 190, 60, 30);btn300 = new JButton("300");c.add(btn300);btn300.addActionListener(this);btn300.setBounds(185, 190, 60, 30);btn500 = new JButton("500");btn500=new JButton("500");c.add(btn500);btn500.addActionListener(this);btn500.setBounds(255, 190, 60, 30);btn1000 = new JButton("1000");c.add(btn1000);btn1000.addActionListener(this);btn1000.setBounds(325, 190, 65, 30);btn001 = new JButton("1");c.add(btn001);btn001.addActionListener(this);btn001.setBounds(45, 230, 60, 30);btn002 = new JButton("2");c.add(btn002);btn002.addActionListener(this);btn002.setBounds(115, 230, 60, 30);btn003 = new JButton("3");c.add(btn003);btn003.addActionListener(this);btn003.setBounds(185, 230, 60, 30);btn004 = new JButton("4");c.add(btn004);btn004.addActionListener(this);btn004.setBounds(255, 230, 60, 30);btn005 = new JButton("5");c.add(btn005);btn005.addActionListener(this);btn005.setBounds(325, 230, 65, 30);btn006 = new JButton("6");c.add(btn006);btn006.addActionListener(this);btn006.setBounds(45, 270, 60, 30);btn007 = new JButton("7");c.add(btn007);btn007.addActionListener(this);btn007.setBounds(115, 270, 60, 30);btn008 = new JButton("8");c.add(btn008);btn008.addActionListener(this);btn008.setBounds(185, 270, 60, 30);btn009 = new JButton("9");c.add(btn009);btn009.addActionListener(this);btn009.setBounds(255, 270, 60, 30); btn000 = new JButton("0");。