File Java Tutorial

String findInLine(Pattern pattern)
String findInLine(String pattern)
If the pattern is found, the matching token is consumed and returned.
Otherwise, null is returned.

import java.util.Scanner;
public class MainClass {
  public static void main(String args[]) {
    Scanner sc = new Scanner("Name: Tom Age: 28 ID: 77");
    sc.findInLine("ID:");
    if (sc.hasNext())
      System.out.println(sc.next());
    else
      System.out.println("Error!");
  }
}
77