Question

我无法弄清楚为什么我的结果不是：

Your first array element is: 0
1
2
3
4
5
6

（预期产出）

我的代码：

public class day7 {
    public static void main(String[] args){
        int arrayZ[] = new int[7];

        arrayZ[0] = 0;
        System.out.println("Your first array element is: " + arrayZ[0]);

        int i = 1;
        while (i <= 6){
            arrayZ[i] = i;
            i++;
        System.out.println(arrayZ[i]);
        }
    System.out.println("Each entry of the array is: " + arrayZ[0] + " " + arrayZ[1] + " " + arrayZ[2] + " " + arrayZ[3] + " " + arrayZ[4] + " " + arrayZ[5] + " " + arrayZ[6]);
    System.out.println("And, the sum of all array elements are: " + arrayZ[0] + arrayZ[1] + arrayZ[2] + arrayZ[3] + arrayZ[4] + arrayZ[5] + arrayZ[6]);
    }
}

结果/实际产出：

Your first array element is: 0
0
0
0
0
0

线程中的异常＆＃34; main＆＃34; java.lang.ArrayIndexOutOfBoundsException：7 在day7.main（day7.java:14）

Answer 1

您的代码是正确的，问题依次为incrementing和printing。

public static void main(String[] args) {
    int arrayZ[] = new int[7];

    arrayZ[0] = 0;
    System.out.println("Your first array element is: " + arrayZ[0]);

    int i = 1;
    while (i <= 6)  {
        arrayZ[i] = i;
        System.out.println(arrayZ[i]);
        i++;
    }
    System.out.println("Each entry of the array is: " + arrayZ[0] + " " + arrayZ[1] + " " + arrayZ[2] + " " + arrayZ[3] + " " + arrayZ[4] + " " + arrayZ[5] + " " + arrayZ[6]);
    System.out.println("And, the sum of all array elements are: " + (arrayZ[0] + arrayZ[1] + arrayZ[2] + arrayZ[3] + arrayZ[4] + arrayZ[5] + arrayZ[6]));
}

此外，您需要先对项目求和，然后需要使用括号，然后使用+和String将其他变量转换为String并显示连接结果。输出是：

你的第一个数组元素是：0
  1
  2
  3
  4
  5
  6
  阵列的每个条目是：0 1 2 3 4 5 6
  并且，所有数组元素的总和是：21

如果你有一个固定的循环计数器边界（在你的情况下是1到6），那么最好使用for循环。

Answer 2

只需切换i ++和System.out.println（arrayZ [i]）之间的界限;

如果你想计算总和，只需将它们添加到一个新变量中或使用（）;

public static void main(String[] args) {
    int arrayZ[] = new int[7];

    arrayZ[0] = 0;
    System.out.println("Your first array element is: " + arrayZ[0]);

    int i = 1;
    while (i <= 6) {
        arrayZ[i] = i;
        System.out.println(arrayZ[i]);
        i++;
    }
    System.out.println("Each entry of the array is: " + arrayZ[0] + " " + arrayZ[1] + " " + arrayZ[2] + " " + arrayZ[3] + " " + arrayZ[4] + " " + arrayZ[5] + " " + arrayZ[6]);
    System.out.println("And, the sum of all array elements are: " + (arrayZ[0] + arrayZ[1] + arrayZ[2] + arrayZ[3] + arrayZ[4] + arrayZ[5] + arrayZ[6]));
}

Answer 3

更改为：

while (i <= 6){
    arrayZ[i] = i;
    System.out.println(arrayZ[i]);
    i++;
}

因为你使用它的方式，它会尝试打印不存在的arrayZ [7]。

Answer 4

只需切换i ++和System.out.println（arrayZ [i]）之间的界限;

如果你想计算总和，只需将它们添加到一个新变量或 use（）;

public static void main(String[] args) {
int arrayZ[] = new int[7];

arrayZ[0] = 0;
System.out.println("Your first array element is: " + arrayZ[0]);

int i = 1;
while (i <= 6) {
    arrayZ[i] = i;
    System.out.println(arrayZ[i]);
    i++;
}
System.out.println("Each entry of the array is: " + arrayZ[0] + " " + arrayZ[1] + " " + arrayZ[2] + " " + arrayZ[3] + " " + arrayZ[4] + " " + arrayZ[5] + " " + arrayZ[6]);
System.out.println("And, the sum of all array elements are: " + (arrayZ[0] + arrayZ[1] + arrayZ[2] + arrayZ[3] + arrayZ[4] + arrayZ[5] + arrayZ[6]));

}

Answer 5

更改while循环代码如下

while (i <= 6){
    arrayZ[i] = i;
    System.out.println(arrayZ[i]);
    i++;
}

Java基本整数数组

5 个答案: