Java 使用b，B，h，H，％和n转换字符。

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

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{

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   public static void main(String[] args) 

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   {

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      Object test = null;

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

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

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

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

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

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

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

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