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HashSet removing duplication in java

package framework;

import java.util.HashSet;
import java.util.LinkedHashSet;

public class String_arry_list {
public static void main(String[] args) {
    String name="neelakanadan";
    LinkedHashSet al=   new LinkedHashSet();    
    for(int i=0;i<name.length();i++)
    {
        boolean add=al.add(name.charAt(i));
        if(add==false) 
        {
            System.out.println(name.charAt(i));
        }
    }System.out.println(al);
}
}

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output

e
a
n
a
a
n
[n, e, l, a, k, d]

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