Java Collection, HashSet Exercises: Compare two sets and retain elements which are same on both sets
Java Collection, HashSet Exercises: Exercise-11 with Solution
Write a Java program to compare two sets and retain elements which are same on both sets.
Sample Solution:
Java Code:
import java.util.*;
public class Exercise11 {
public static void main(String[] args) {
// Create a empty hash set
HashSet<String> h_set1 = new HashSet<String>();
// use add() method to add values in the hash set
h_set1.add("Red");
h_set1.add("Green");
h_set1.add("Black");
h_set1.add("White");
System.out.println("Frist HashSet content: "+h_set1);
HashSet<String>h_set2 = new HashSet<String>();
h_set2.add("Red");
h_set2.add("Pink");
h_set2.add("Black");
h_set2.add("Orange");
System.out.println("Second HashSet content: "+h_set2);
h_set1.retainAll(h_set2);
System.out.println("HashSet content:");
System.out.println(h_set1);
}
}
Sample Output:
Frist HashSet content: [Red, White, Black, Green] Second HashSet content: [Red, Pink, Black, Orange] HashSet content: [Red, Black]
Pictorial Presentation:
Flowchart:
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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