java - 索引 0 超出长度 0 数组 3D 的范围

Question

我正在使用 3D 数组 int，下面的代码我收到数组索引越界错误，下面是相同的代码:-

package array2d;

import java.util.Scanner;

public class Array3 {

    public static void main(String[] Args) {
        Scanner vee= new Scanner(System.in);
        int penilaian[][][];
        int mahasiswa[];

        for (int i = 0; i < 5; i++) {
            System.out.print("Class" + (i + 1) + " : ");
            int mhs = vee.nextInt();

            System.out.println("------------------------------------------------");
            mahasiswa = new int[mhs];

            penilaian = new int[i][mahasiswa.length][3];

            for (int j = 0; j < mahasiswa.length; j++) {
                System.out.print("Score Mid Test" + (i + 1) + " Ke -" + (j + 1) + " :");
                penilaian[i][j][0] = vee.nextInt();
                System.out.print("Score Test" + (i + 1) + " Ke -" + (j + 1) + " :");
                penilaian[i][j][1] = vee.nextInt();
                System.out.print("Score Project" + (i + 1) + " Ke -" + (j + 1) + " :");
                penilaian[i][j][2] = vee.nextInt();
                System.out.println("=======================================================================");

            }
        }
    }

}

出现以下错误:-

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at array2d.TugasArray3.main(TugasArray3.java:27) Score Mid Test1 Ke -1

Answer 1

声明一个三维 (3d) 数组 penilaian = new int[i][mahasiswa.length][3]; 当 i=0 的大小第一个元素是 0，因此您无法为此数组分配任何值