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Find duplicate value in array using java

Java array check duplicates

duplicates = false;

for(i = 0; i < zipcodeList.length; i++) {
	for(j = i + 1; k < zipcodeList.length; j++) {
  		if(j != i && zipcodeList[j] == zipcodeList[i]) {
   	  		duplicates = true;
		}
	}
}

Source: stackoverflow.com

Find duplicate value in array using java

public class DuplicateArrayElement {
  public static void main(String[] args) {
    int[] numArray = {2, 6, 7, 6, 2, 19, 1, 19};
    for(int i = 0; i < numArray.length; i++){
      for(int j = i + 1; j < numArray.length; j++){
        if(numArray[i] == numArray[j]){
          System.out.println("Duplicate element found " + numArray[j]);
        }
      }
    }    
  }
}

Source: netjstech.com

Java find duplicates in array

// Uses a set, which does not allow duplicates 

for (String name : names) 
{
     if (set.add(name) == false) 
     {
        // print name your duplicate element
     }
}

Source: javarevisited.blogspot.com

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