使用b，B，h，H，％和n转换字符。

public class Main /*from 时代Java - nowjava.com*/

{

   public static void main(String[] args) 

   {

      Object test = null;

      System.out.printf("%b\n", false);

      System.out.printf("%b\n", true);

      System.out.printf("%b\n", "Test");

      System.out.printf("%B\n", test);

      System.out.printf("Hashcode of \"hello\" is %h\n", "hello");

      System.out.printf("Hashcode of \"Hello\" is %h\n", "Hello");

      System.out.printf("Hashcode of null is %H\n", test);

      System.out.printf(