0
我正在编程GUI（银行账户）。一切工作正常;但在JPanel中显示当前余额时遇到问题，当我点击提交按钮时，它应该显示余额。我尝试了很多不同的方式，但仍然不成功。在JPanel中显示和更新余额
我的信息在JTextArea中正确显示。
但我不能让它显示第三个JPanel（“当前金额”）的金额。 我在JTextField中输入的金额并点击提交，它应该显示在JPanel（“当前金额”）中。
而且每当我输入一个人的相同ID并点击提交按钮时，金额应该更新。 我真的有构建逻辑的问题。 我已经发布了整个编码。 请参阅我下面的编码：
// Account类
public class Account
{
private String id;
private double balance;
private String name;
private double withdraw;
private double deposit;
public Account(String id, double balance, String name, double withdraw, double deposit)
{
this.id = id;
this.balance = balance;
this.name = name;
this.withdraw = withdraw;
this.deposit = deposit;
}
public Account()
{
}
public void setId(String acID)
{
this.id = acID;
}
public void deposit(double sum)
{
this.balance = this.balance + sum;
}
public void withdraw(double sum)
{
this.balance = this.balance - sum;
}
public String getId()
{
return this.id;
}
public void setBalance(double blnc)
{
this.balance = blnc;
}
public double getBalance()
{
return this.balance;
}
public String getName()
{
return this.name;
}
public void setName(String a)
{
this.name = a;
}
public double getWithdraw()
{
return this.withdraw;
}
public double getDeposit()
{
return this.deposit;
}
public String toString()
{
return " " + getId()
+ " - " + getName()
+ " - " + getBalance();
}
}
//银行类
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.util.List;
import java.util.ArrayList;
public class Bank implements ActionListener,ItemListener
{
private List<Account> store;
DefaultListModel listModel = new DefaultListModel();
JList list = new JList(listModel);
FlowLayout flow = new FlowLayout();
ButtonGroup group = new ButtonGroup();
JFrame frame = new JFrame("Lexus Bank");
JPanel p = new JPanel();
JPanel p2 = new JPanel();
JPanel p3 = new JPanel();
JPanel p4 = new JPanel();
JRadioButton a = new JRadioButton("Savings");
JRadioButton b = new JRadioButton("Current");
JRadioButton c = new JRadioButton("Deposit");
JRadioButton d = new JRadioButton("Withdraw");
JLabel l1 = new JLabel("A/C No:");
JLabel l2 = new JLabel("A/C Name:");
JTextField accID = new JTextField(10);
JTextField accName = new JTextField(10);
JLabel l3 = new JLabel();
JLabel l4 = new JLabel();
JLabel l5 = new JLabel("Amount: ");
JLabel l6 = new JLabel("Current \n Amount: ");
JLabel currentBal = new JLabel();
JTextField amount = new JTextField(10);
JButton button = new JButton("Submit");
JTextArea area = new JTextArea(10,30);
public Bank()
{
store = new ArrayList<Account>();
//Setting values for JFrame
frame.setSize(800,600);
frame.add(p);
frame.add(p2);
frame.add(p3);
frame.add(p4);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Adding the buttons in group
group.add(a);
group.add(b);
group.add(c);
group.add(d);
//Setting value for panel 1
frame.getContentPane().setLayout(flow);
p.setPreferredSize(new Dimension(100,100));
p.setLayout(new GridLayout(2,1));
p.add(a);
p.add(b);
p.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(),"A/C Type"));
//Setting value for panel 2
p2.setPreferredSize(new Dimension(300,100));
p2.setLayout(new GridLayout(4,3));
p2.add(l1);
p2.add(accID);
p2.add(l2);
p2.add(accName);
p2.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(),"Account Details"));
p2.setVisible(false);
//Setting value for panel 3
p3.setPreferredSize(new Dimension(300,150));
p3.setLayout(new FlowLayout());
p3.add(l3);
p3.add(c);
p3.add(l4);
p3.add(d);
p3.add(l5);
p3.add(amount);
p3.add(button);
p3.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(),"Transaction"));
p3.add(l6);
p3.setVisible(false);
//Setting value for panel 4
p4.setLayout(new GridLayout(1,2));
p4.add(area);
p4.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(),"Transaction History"));
p4.setVisible(false);
//Creating Actions
a.addItemListener(this);
b.addItemListener(this);
c.addActionListener(this);
d.addActionListener(this);
button.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();
if(source == button)
{
Account amnt = new Account();
amnt.setBalance(Integer.parseInt(amount.getText()));
//currentBal.append(amnt.getBalance());
store.add(amnt);
}
if(e.getSource() == button)
{
if(c.isSelected())
{
Account acnt = new Account();
acnt.setId(accID.getText());
acnt.setName(accName.getText());
acnt.setBalance(Integer.parseInt(amount.getText()));
//store.add(ad);
area.append("\nDP-"+ acnt.toString());
store.add(acnt);
}
if(d.isSelected())
{
Account acnt = new Account();
acnt.setId(accID.getText());
acnt.setName(accName.getText());
acnt.setBalance(Integer.parseInt(amount.getText()));
area.append("\nWD-"+acnt.toString());
store.add(acnt);
}
}
}
public void itemStateChanged(ItemEvent e)
{
Object source = e.getSource();
if(source == a)
{
p2.setVisible(true);
p3.setVisible(true);
p4.setVisible(true);
}
if(source == b)
{
p2.setVisible(true);
p3.setVisible(true);
p4.setVisible(true);
}
}
}
// Driver类运行的程序
public class BankTest {
public static void main(String[] args)
{
Bank test = new Bank();
}
}
此问题更适合代码审查。此外，代码中的很多问题。 –
我英语有点弱。让我附上屏幕截图，然后问题会更有意义 – user2448774
@ user2448774您需要在actionListner中添加类似'l6.setText（amount.getText（））;'[Class JTextComponent＃setText（）]（http： //docs.oracle.com/javase/7/docs/api/javax/swing/text/JTextComponent.html#setText(java.lang.String）） – Smit