Try these using `stdin.hasNext()`

import java.io.BufferedInputStream; import java.util.Scanner; public class ReadMultiline { public static void main(String args[]) { Scanner stdinput = new Scanner(new BufferedInputStream(System.in)); while (stdinput.hasNext()) { System.out.println(Math.abs(stdinput.nextLong() - stdinput.nextLong())); String s=scanner.next(); } } }

This is good for taking multiple line input
import java.util.Scanner; public class JavaApp { public static void main(String[] args){ Scanner scanner = new Scanner(System.in); String line; while(true){ line = scanner.nextLine(); System.out.println(line); if(line.equals("")){ break; } } } }