只要布爾方法返回true,我的代碼似乎都能正常工作。然而,當試圖測試錯誤,用戶輸入10個數字,我收到以下錯誤後:修復主線程異常
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 9
at FunArrays.main(FunArrays.java:15
我缺少什麼或者我的代碼俯瞰?
這裏是我的代碼:
import java.util.Scanner;
public class FunArrays {
public static void main(String[] args) {
Scanner input = new Scanner (System.in);
System.out.println("Please enter ten numbers....");
int [] userArray = new int [9];
for(int b = 0; b < 10 ; b++){
userArray [b] = input.nextInt();
}
boolean lucky = isLucky(userArray);
if (lucky){
sum(userArray);
} else
sumOfEvens(userArray);
}
public static boolean isLucky(int [] numbers){
for (int i = 0; i <= numbers.length; i++){
if (numbers[i]== 7 || numbers[i] == 13 || numbers[i] == 18){
return true;
}
}
return false;
}
public static void sum(int [] numbers){
int sum = 0;
for (int x = 0; x <= numbers.length -1; x++){
sum += numbers[x];
}
System.out.println(sum);
}
public static void sumOfEvens(int [] numbers){
int evens = 0;
for (int y = 0; y <= numbers.length -1; y++){
if (numbers[y] % 2 == 0){
evens += numbers[y];
}
}
System.out.println(evens);
}
}
usersArray是長度爲9(0 ... 8) - 但是你的循環從0到9運行。所以當b是9時,你超出了數組的範圍。 – matmo
您正在創建包含9個元素的數組 – Subhiksh
請記住,數組是'0-indexed'。這是每個程序員都會遇到的問題之一。 :) –