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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.text.*;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13. 		System.out.println(format(0.4999d, 1));
  14. 		System.out.println(format(0.0299d, 2));
  15. 		System.out.println(format(0.34943d, 3));
  16. 		System.out.println(format(0.98499d, 3));
  17. 		System.out.println(format(0.66666666d, 5));
  18.  
  19. 		System.out.println("---------");
  20.  
  21. 		// briancherron - Standard method
  22.  
  23. 		NumberFormat nf = NumberFormat.getInstance();
  24. 		nf.setMaximumIntegerDigits(0);
  25.  
  26. 		System.out.println(nf.format(0.4999d));
  27. 		System.out.println(nf.format(0.0299d));
  28. 		System.out.println(nf.format(0.34943d));
  29. 		System.out.println(nf.format(0.98499d));
  30. 		nf.setMaximumFractionDigits(5);
  31. 		System.out.println(nf.format(0.66666666d));
  32.  
  33. 	}
  34.  
  35. 	public static String format(double value, int decimalPlaces) {
  36. 		if (value >= 1 || value < 0) {
  37. 			throw new IllegalArgumentException("Value must be between 0 and 1");
  38. 		}
  39. 		String tmp = String.format("%." + decimalPlaces + "f", value);
  40. 		return tmp.substring(1);
  41. 	}
  42.  
  43.  
  44. }
Success #stdin #stdout 0.1s 380736KB
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stdin
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Standard input is empty
stdout
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.5
.03
.349
.985
.66667
---------
.5
.03
.349
.985
.66667
https://ideone.com/BhiplP
http://stackoverflow.com/questions/21893905
language:
Java (12.0.1)
created:
10 years ago
visibility:
secret

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