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Get the union of two sets in Java
To get the union of two sets, use the addAll() method.
The first set −
HashSet <String> set1 = new HashSet <String>();
set1.add("Mat");
set1.add("Sat");
set1.add("Cat");The second set −
HashSet <String> set2 = new HashSet <String>();
set2.add("Mat");
set2.add("Cat");
set2.add("Fat");
set2.add("Hat");Get the union −
set1.addAll(set2);
The following is an example −
Example
import java.util.*;
public class Demo {
public static void main(String args[]) {
HashSet <String> set1 = new HashSet <String>();
HashSet <String> set2 = new HashSet <String>();
set1.add("Mat");
set1.add("Sat");
set1.add("Cat");
System.out.println("Set1 = "+ set1);
set2.add("Mat");
set2.add("Cat");
set2.add("Fat");
set2.add("Hat");
System.out.println("Set2 = "+ set2);
set1.addAll(set2);
System.out.println("Union = "+ set1);
}
}Output
Set1 = [Mat, Sat, Cat] Set2 = [Mat, Cat, Fat, Hat] Union = [Mat, Sat, Cat, Fat, Hat]
Published on 10-Jan-2019 09:25:52
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