类型 PrintStream 中的方法 printf（String, Object[]）对于参数（String, 
 double）不适用
下面这段程序怎么改一下啊?各位大虾,帮帮忙,我是刚学.

import java.util.Scanner

public class AccountTest 
{
    public static void main(String args[]) 
    {
        Account account1 = new Account(50.00);
        Account account2 = new Account(-7.53);
        
        System.out.printf( "account balance:$%.2f\n",
                account1.getBalance() );
        System.out.printf( "account balance:$%.2f\n\n", 
                account2.getBalance() );
        
        Scanner input = new Scanner(System.in);
        double depositAmount;
        
        System.out.print("Enter deposit amount for account1:");
        depositAmount = input.nextDouble();
        System.out.printf("\nadding %.2f to account1 balance\n\n ", depositAmount);
        account1.credit(depositAmount);
        
        System.out.printf( "account balance:$%.2f\n",
                account1.getBalance() );
        System.out.printf( "account balance:$%.2f\n\n", 
                account2.getBalance() );
        
        System.out.print("Enter deposit amount for account2:");
        depositAmount = input.nextDouble();
        System.out.printf("\nadding %.2f to account1 balance\n\n ", depositAmount);
        account2.credit(depositAmount);
        
        System.out.printf( "account balance:$%.2f\n",
                account1.getBalance() );
        System.out.printf( "account balance:$%.2f\n", 
                account2.getBalance() );
    }

}//end class AccountTest