A JAVA code read each line in the input file, check if there is no negative number and ignore all space

characters.

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class ReadFile {

    public static void main(String[] args) {

        String filePath = "input.txt";
        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            String line;
            while ((line = br.readLine()) != null) {
                line = line.replaceAll("\\s", ""); // remove all spaces
                boolean hasNegative = false;
                String[] nums = line.split(",");
                for (String num : nums) {
                    if (Integer.parseInt(num) < 0) {
                        hasNegative = true;
                        break;
                    }
                }
                if (!hasNegative) {
                    System.out.println(line);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

This code uses a `BufferedReader` to read each line in the input file. It then removes all spaces from the line using the `replaceAll` method. It then checks if there are any negative numbers in the line by splitting it into an array of numbers using the `split` method and then iterating over each number to check if it is negative. If there are no negative numbers, the line is printed to the console.