二进制运算符“ *”的错误操作数类型

Question

Bad operand type for Binary operator "*"

I am getting the error during compilation as Bad operand type of Binary operator saying that: first type: int second type: int[] and i have to use this logic only. Following is a part of my program

public static int pmean(int[] ar){
    int[][] a = new int[ar.length][ar.length];
    int k=0;
    int min=0;
    int sum=0;
    for(int i=0;i<ar.length;i++){
        k=i+1;
        for(int j=0;j<ar.length;j++){
            a[i][j]= (k * a[j]);//error at this line
            k++;
            if(k==ar.length+1)
                k=1;
        }
    }

Answer 1

a[i][j]= (k * a[j]); a[j] is an array, you probably meant a[i][j]

Answer 2

a is a two dimensional array so a[j] is an array. You cant multiple and int with an array