Java Collection How to - Create a Set based on hash value

• Back to Set  ↑

Question

We would like to know how to create a Set based on hash value.

Answer

import java.util.HashSet;
import java.util.Set;
/*from ww w. ja va 2  s  . c o  m*/
public class MainClass {

  public static void main(String[] a) {
    Set set = new HashSet();
    set.add("Hello");
    if (set.add("Hello")) {
      System.out.println("addition successful");
    } else {
      System.out.println("addition failed");
    }

  }
}

The code above generates the following result.

• Back to Set  ↑