Return a new object as return value in java

Question

public class myMethod {
      public int[] twoSum(int[] nums, int target) {
        int length = nums.length;
        for(int i=0;i<length;i++)
        {
            for(int j=i+1;j<length;j++)
            {
                if(nums[i]+nums[j]==target)
                    return new int[]{i,j};
            }
        }
    }
}

It show "error: missing return statement". I have returned an Array, where is the problem? Do I need such like Array.newInstance() ? Thanks in advance.

What do you return if `nums` has length 0? – Savior Apr 18 '16 at 15:19 — Savior, Apr 18 '16 at 15:19

score 1 · Accepted Answer · answered Apr 18 '16 at 15:20

1

You don't return any value in case the content of your if block is never reached.

You can return a default value like this:

public int[] twoSum(int[] nums, int target) {
  ...
  return null;
}

answered Apr 18 '16 at 15:20

Nicolas Filotto

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Thanks for remind me that, a method must at least have a exit for all cases. – wh279813 Apr 19 '16 at 02:35

Return a new object as return value in java

1 Answers1