Java中实现格式化输出的几种方式:
  1、System.out.printf(); 类似于c语言的printf方法。如:
  int x = 55;
  System.out.format(“x = %5x”, x);
  输出结果为:x = 37
  2、System.out.format() int x = 55;
  System.out.printf(“x = %5c”, x);
  输出结果为:x = 7
  3、String.format() String提供的静态方法。
  int x = 55;
  System.out.println(String.format(“x = %5x”, x));
  输出结果为:x = 37
  4、Formatter int x = 55;
  Formatter format = new Formatter(System.out);
  format.format(“x = %5x”, x);
  输出结果为:x = 37