Java 使用精度进行浮动

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public class Main 

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{

/**

 * 时 代 J a v a - nowjava.com 提 供 

**/

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   public static void main(String[] args)

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   { 

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      double f = 123.94536; 

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      String s = "Happy Birthday"; 

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      System.out.printf("Using precision for floating-point numbers\n");

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      System.out.printf("\t%.3f\n\t%.3e\n\t%.3g\n\n", f, f, f);  

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      System.out.printf("Using precision for strings\n");

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