An inexplicable problem in processing params Follow

Hi, there.

I have an inexplicable problem in processing params.

This is my method code block,

import java.util.HashMap;
import java.util.Map;

class TwoSum_Solution {
    public int[] twoSum(int[] nums, int t) {
        Map<Integer, Integer> map = new HashMap<>();
        int n = nums.length;
        for (int i = 0; i < n; ++i) {
            int b = t - nums[i];
            if (map.containsKey(b)) {
                return new int[]{map.get(b), i};
            }
            map.put(nums[i], i);
        }
        return new int[]{};
    }
}

And this is my testing class:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class _0001_TwoSumTest {
    public static int[] stringToIntegerArray(String input) {
        input = input.trim();
        input = input.substring(1, input.length() - 1);
        if (input.length() == 0) {
            return new int[0];
        }

        String[] parts = input.split(",");
        int[] output = new int[parts.length];
        for (int index = 0; index < parts.length; index++) {
            String part = parts[index].trim();
            output[index] = Integer.parseInt(part);
        }
        return output;
    }

    public static String integerArrayToString(int[] nums, int length) {
        if (length == 0) {
            return "[]";
        }

        StringBuilder result = new StringBuilder();
        for (int index = 0; index < length; index++) {
            int number = nums[index];
            result.append(number).append(", ");
        }
        return "[" + result.substring(0, result.length() - 2) + "]";
    }

    public static String integerArrayToString(int[] nums) {
        return integerArrayToString(nums, nums.length);
    }

    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while ((line = in.readLine()) != null) {
            int[] nums = stringToIntegerArray(line);
            line = in.readLine();

            int target = Integer.parseInt(line);
            int[] ret = new TwoSum_Solution().twoSum(nums, target);

            String out = integerArrayToString(ret);

            System.out.print(out);
        }
    }
}

All the code comes from:

https://leetcode.com/problems/two-sum/

should be okay.

Here's the situation 1:

When I run my testing class, I input:

[1,2,3]

then press "enter", then input:

5

and press again I received:

Exception in thread "main" java.lang.NumberFormatException: For input string: ""
    at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
    at java.base/java.lang.Integer.parseInt(Integer.java:678)
    at java.base/java.lang.Integer.parseInt(Integer.java:786)
    at _0001_TwoSumTest.main(_0001_TwoSumTest.java:45)

Process finished with exit code 1

this probliem only occurs on my laptop, but not on my PC.

Here's the situation 2:

But if I input this on my laptop:

[1,2,3]
5

then press "enter" I received correct output:

[1, 2]

I am really wondering why.

I wish my laptop works well on situation 1 and returns no exception.

Could anyone help? I'd be really thankful!