Set In Java

import java.lang.Math; // headers MUST be above the first class
import java.util.*;

// one class needs to have a main() method
public class HelloWorld {
  // arguments are passed using the text field below this editor
  public static void main(String[] args) {
    Set < String > set = new HashSet < String > ();
    set.add("Test1");
    set.add("Test2");
    set.add("Test1");
    System.out.println(set);
  }
}

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