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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.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	static double round(double d, int n)
  11. 	{
  12.     	return ((int)(d * Math.pow(10.0, (double)(n)) + 0.5)) / Math.pow(10.0, (double)(n));
  13. 	}
  14. 	public static void main (String[] args) throws java.lang.Exception
  15. 	{
  16. 		double d = 12.34567890123;
  17. 		d = round(d, 1);
  18. 		System.out.println(d);
  19. 		d = 12.34567890123;
  20. 		d = round(d, 2);
  21. 		System.out.println(d);
  22. 		d = 12.34567890123;
  23. 		d = round(d, 3);
  24. 		System.out.println(d);
  25. 		d = 12.34567890123;
  26. 		d = round(d, 4);
  27. 		System.out.println(d);
  28. 		d = 12.34567890123;
  29. 		d = round(d, 5);
  30. 		System.out.println(d);
  31. 	}
  32. }
Success #stdin #stdout 0.1s 320576KB
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Standard input is empty
stdout
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12.3
12.35
12.346
12.3457
12.34568
https://ideone.com/VfqlSn
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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