code: package edu.iastate.cs.egroum.aug;
  
  import java.io.File;
  import java.io.PrintWriter;
  import java.util.StringTokenizer;
  
  public class Scratch {
  
  	 private static final String DELIMITERS =
  	            " \n.();-\"=,*/{}_<>+\r:'@[]&\\!#|?$^%~`\t";
  	 
  	public static void main(String...strings ) {
  //		File f = new File("hello_world"); 
  //		try (PrintWriter pw = new PrintWriter(f)) {
  //			
  //			int i = 5 + 5;
  //		} catch(Exception e) {
  //			
  //			
  //		} finally {
  //			System.out.println("hello world");
  //		}
  //		
  //		
  //		Long l = null;
  ////		long ll = l;
  //		if (l instanceof Long) {
  //			System.out.println("");
  //		}
  		
  		String a  = "hello " + null;
  		System.out.println(a);
  //		Object s = (int) l;
  		
  		StringTokenizer tokenizer = new StringTokenizer(" ", DELIMITERS);
          while (tokenizer.hasMoreTokens()) {
              String token = tokenizer.nextToken();
              char first = token.charAt(0);
              System.out.println(first);
              System.out.println("===");
          }
  			
  	}
  	
  }
  