How to Get Length of a Set in Java - Step by Step Examples

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How to Get Length of a Set in Java ?

Answer

To get the size of a set in Java, you can use the size method of the set.

✐ Examples

1 Get Size of Set

In this example,

We create a set named set1 with some elements.
We use the size method of the set object set1 to get the number of elements in the set.
The size method returns the size of the set.
Finally, we print the size of the set to standard output.

Java Program

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

public class Main {
    public static void main(String[] args) {
        Set<String> set1 = new HashSet<>();
        set1.add("apple");
        set1.add("banana");
        set1.add("cherry");
        int size = set1.size();
        System.out.println("Size of set1 is: " + size);
    }
}

Output

Size of set1 is: 3

2 Get Size of Empty Set

In this example,

We create an empty set named emptySet.
We use the size method of the set object emptySet to get the number of elements in the set.
Since the set is empty, the size method returns 0.
Finally, we print the size of the empty set to standard output.

Java Program

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

public class Main {
    public static void main(String[] args) {
        Set<String> emptySet = new HashSet<>();
        int size = emptySet.size();
        System.out.println("Size of emptySet is: " + size);
    }
}

Output

Size of emptySet is: 0

Summary

In this tutorial, we learned How to Get Length of a Set in Java language with well detailed examples.

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