索引0超出长度0数组3d的界限

Question

我使用的是一个3D数组，下面的代码是我得到的数组索引超出界限的错误，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("=======================================================================");

            }
        }
    }

}

获取以下错误：-

线程“main”Java.lang.ArrayIndexOutOfBoundsException中出现异常：索引0超出了Array2d.TugasArray3.Main(TugasArray3.:27)得分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第一个元素的大小为0时，您就不能给这个数组赋任何值