How to add an Item to a Set in Java - Step by Step Examples

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How to add an Item to a Set in Java ?

Answer

To add an item to a set in Java, you can use the add method of the Set interface.

✐ Examples

1 Add an Item to a Set

In this example,

We have an existing set named mySet.
We use the add method to add a new item to mySet.

Java Program

import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        Set<String> mySet = new HashSet<>();
        mySet.add("apple");
        mySet.add("banana");
        mySet.add("orange");
        System.out.println("Set before adding item: " + mySet);
        mySet.add("grape");
        System.out.println("Set after adding item: " + mySet);
    }
}

Output

Set before adding item: [apple, banana, orange]
Set after adding item: [apple, banana, orange, grape]

2 Add an Integer to a Set

In this example,

We have an existing set named numberSet.
We use the add method to add a new integer to numberSet.

Java Program

import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        Set<Integer> numberSet = new HashSet<>();
        numberSet.add(1);
        numberSet.add(2);
        numberSet.add(3);
        numberSet.add(4);
        numberSet.add(5);
        System.out.println("Set before adding integer: " + numberSet);
        numberSet.add(6);
        System.out.println("Set after adding integer: " + numberSet);
    }
}

Output

Set before adding integer: [1, 2, 3, 4, 5]
Set after adding integer: [1, 2, 3, 4, 5, 6]

Summary

In this tutorial, we learned How to add an Item to a Set in Java language with well detailed examples.

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How to add an Item to a Set in Java - Step by Step Examples

How to add an Item to a Set in Java ?

Answer

✐ Examples

1 Add an Item to a Set

Java Program

Output

2 Add an Integer to a Set

Java Program

Output

Summary

More Java Sets Tutorials