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Coding Numbers - Duplicate - HashSet
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//[Java]Coding Numbers - Duplicate - HashSet // // //Title of this code //'main' method must be in a class 'Rextester'. //Compiler version 1.8.0_72 import java.util.*; //java.util.HashSet //java.util.Set import java.lang.*; class Rextester { public static void main(String args[]) { int[] numbers={12,3,4,55,32,76,23,34,22,22,76}; Set<Integer> set = new HashSet<Integer>(); for(int n: numbers) { boolean unique = set.add(n); if (!unique) System.out.println("Duplicate: "+n); } } }
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Compilation time: 0.62 sec, absolute running time: 0.14 sec, cpu time: 0.06 sec, memory peak: 19 Mb, absolute service time: 0,76 sec
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Duplicate: 22 Duplicate: 76