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  1. class Ideone {
  2. 	public static void main (String[] args) {
  3. 		String[] tests = {
  4.           "0.12345678901234567890",
  5.           "123.456",
  6.           "1234.12345678901234567890123",
  7.           "0.123456789012345678",
  8.         };
  9.  
  10.         for (String str : tests) {
  11.             str = str.replaceAll("(?<=\\..{18}).*", "");
  12.             System.out.println(str);
  13.         }
  14. 	}
  15. }
Success #stdin #stdout 0.09s 52016KB
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stdin
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Standard input is empty
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0.123456789012345678
123.456
1234.123456789012345678
0.123456789012345678
https://ideone.com/djzegW
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
public

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