该程序要求用户输入一些金额,该金额将存储到数组中。
但是对于我来说,在输入金额时,程序显示错误:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at bankapplication.DepositWithdraw.deposit(DepositWithdraw.java:17)
at bankapplication.BankApplication.main(BankApplication.java:46)
我的密码
package bankapplication;
import java.util.*;
public class DepositWithdraw {
Scanner input = new Scanner(System.in);
int TransacNum;
double withAm;
int depAmArr[] = new int[TransacNum];
public void deposit() {
System.out.println("Depositing:\nHow many transaction you want to make? ");
TransacNum = input.nextInt();
for (int i = 0; i < TransacNum; i++) {
System.out.println("Enter amount " + (i + 1) + ":");
depAmArr[i] = input.nextInt();
}
System.out.println("You are done! Choose other option if you want to continue.\n");
}
}
[注意:该类及其方法应在我的主类中调用。我没有在这里显示我的主班,但是如果需要,我将编辑该帖子]
最佳答案
TransacNum
,默认情况下为0
,直到您为其分配值为止。问题在于您可以在此之前使用它来初始化depAmArr
。只需在TransacNum
之后初始化它,就可以了:
TransacNum = input.nextInt();
depAmArr[] = new int[TransacNum];