帮忙看一下程序

Question

public void start(final double rate){
ActionListener adder=new ActionListener(){
public void actionPerformed(ActionEvent event)
{
double interest=balance*rate/100;
balance+=interest;
NumberFormat formatter=NumberFormat.getCurrencyInstance();
System.out.println("balance="+
formatter.format(balance));
}
}
Timer t=new Timer(1000,adder);
t.start();
}
private double balance;
}

Answer 1

更完整的写法：
public void start(final double rate){
ActionListener adder=new ActionListener(){  //这里加个大括号
public void actionPerformed(ActionEvent event)
{
double interest=balance*rate/100;
balance+=interest;
NumberFormat formatter=NumberFormat.getCurrencyInstance();
System.out.println("balance="+
formatter.format(balance));
}
};    //这里还要加个分号
Timer t=new Timer(1000,adder);
t.start();

Answer 2

最终正确的程序：
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
public class AnonymouslnnerClassTest{
public static void main(String[] args){
BankAccount account =new BankAccount(10000);
account.start(10);
JOptionPane.showMessageDialog(null,"quit program");
System.exit(0);
}
}
class BankAccount{
public BankAccount(double initialBalance){  //你这里把initialBalance拼错了
balance=initialBalance;
}
public void start(final double rate){
ActionListener adder=new ActionListener(){ //这里加个大括号
public void actionPerformed(ActionEvent event)
{
double interest=balance*rate/100;
balance+=interest;
NumberFormat formatter=NumberFormat.getCurrencyInstance();
System.out.println("balance="+
formatter.format(balance));
}
};  //这里还要加个分号
Timer t=new Timer(1000,adder);
t.start();
}
private double balance;
}运行结果：
balance=￥11,000.00
balance=￥12,100.00
balance=￥13,310.00
balance=￥14,641.00

Answer 3

晕，你仔细看，以前你写的：
public BankAccount(double initialBlance){
把这里的initialBalance写成了initialBlance