如何在 JAVA 中使用二维数组从用户那里获取多个输入？

Question

While completing a problem i got a problem where i am getting run time error whenever user giving more than 3 inputs . Example of 5 inputs line given bellow

Input:

2 5

5 1

2 1

3 1

1 1

4 1

In the first line "5" is number of test cases .

My code only runs for first 3 lines of inputs i hope anyone can help me to identify the problem in my code so that it works for any number of input line given by the user .

import java.util.Scanner;

public class Test{

public static void main(String[]args){

    Scanner robo=new Scanner(System.in);
    int num=robo.nextInt();
    int array [][]=new int [5][2];

    for(int i=0;i<array.length;i++){
      for(int j=0;j<array.length;j++){
        array[i][j]=robo.nextInt();
      }
    }

    int word=num;
    String result="";

    if(array[0][0]>num){
      System.out.print("NO");
    }else{
      for(int i=0;i<num1-1;i++){       
        word=array[i][1]+word;
        if(array[i+1][0]<word){
          result="YES";
        }else{
          result="NO";
        }
      }
      System.out.println(result);
    }
  }
}

Answer 1

I think I see your problem:

In this loop:

for(int i=0;i<array.length;i++){

  for(int j=0;j<array.length;j++){

    array[i][j]=robo.nextInt();
  }

}

i runs from 0 to 4 and j ALSO runs from 0 to 4, because the length of your array is 5, even if each of the 5 array entries is an array with size 2. Still array.length of the "outer" array is 5. And therefore array[i][j] will throw an exception as soon as j becomes 2 or bigger, because each of the inner arrays has only 2 elements.