Write a Program To Find The Duplicate Elements In An Array?
package com.java.Softwaretestingblog;
import java.util.HashSet;
public class ArrayDuplicate {
public static void main(String[] args) {
// TODO Auto-generated method stub
String[] strArr = {"one","two","three","four","four","two","five"};
HashSet<String> unique = new HashSet<String>();
for(String str:strArr)
{
if(unique.add(str))
{
continue;
}
else
System.out.println("Duplicate Entry is: "+str);
}
}
}Let’s Execute The Above Duplicate Elements Program: The Output link
Check Also: Program to Print Default Array Value
Results:
Duplicate Entry is: four Duplicate Entry is: two
Another Solution
package com.java.interviewFAQ;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class RemoveDuplicateFromArray
{
public static void main(String[] args)
{
// A string array with duplicate values
String[] data = { "E", "C", "B", "E", "A", "B", "E", "D", "B", "A" };
System.out.println("Original array : " + Arrays.toString(data));
List<String> list = Arrays.asList(data);
System.out.println(list.size());
Set<String> set = new HashSet<String>(list);
System.out.print("After removing duplicates: ");
System.out.println(set.size());
String[] resarray= new String[set.size()];
set.toArray(resarray);
for (String ele: resarray)
{
System.out.print(ele + ", ");
}
}
}
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