二维数组1-6编程练习，这样怎么实现不了？

package com.Imooc;

import java.util.Scanner;

public class score {

public static void main(String[] args) {

int[][] intArray=new int[3][2];

Scanner sc=new Scanner(System.in);

int sum1=0,sum2=0,average1=0,average2=0;

for(int j=0;j<3;j++) {

for(int i=0;i<2;i++) {

String[] str= {"第1个语文","第1个数学","第2个语文","第2个数学","第3个语文","第3个数学"};

System.out.println(str[j][i]);

intArray[j][i]=sc.nextInt();

}

   sum1=sum1+intArray[j][0];

   average1=sum1/intArray.length;

   sum2=sum2+intArray[j][1];

   average2=sum2/intArray.length;

}

System.out.println("语文总成绩"+sum1);

System.out.println("语文平均分"+average1);

System.out.println("数学总成绩"+sum2);

System.out.println("数学平均分"+average2);

}

}