How to create a Set of Strings in Java - Step by Step Examples

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How to create a Set of Strings in Java ?

Answer

In Java, you can use the HashSet class to create a set of strings.

✐ Examples

1 Create Set of Strings using HashSet

In this example,

We import the java.util.HashSet class to use the HashSet data structure for strings.
We create a HashSet named stringSet to store strings.
We add strings to the set using the add method.
The resulting set contains unique strings in no particular order.

Java Program

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

public class Main {
    public static void main(String[] args) {
        // Create a HashSet of strings
        Set<String> stringSet = new HashSet<>();

        // Add strings to the set
        stringSet.add("Apple");
        stringSet.add("Banana");
        stringSet.add("Cherry");

        // Print the set
        System.out.println(stringSet);
    }
}

Output

[Apple, Banana, Cherry]

2 Create Sorted Set of Strings using TreeSet

In this example,

We import the java.util.TreeSet class to use the TreeSet data structure for strings.
We create a TreeSet named stringSet to store strings in sorted order.
We add strings to the set using the add method.
The resulting set contains unique strings sorted alphabetically.

Java Program

import java.util.Set;
import java.util.TreeSet;

public class Main {
    public static void main(String[] args) {
        // Create a TreeSet of strings
        Set<String> stringSet = new TreeSet<>();

        // Add strings to the set
        stringSet.add("Banana");
        stringSet.add("Cherry");
        stringSet.add("Apple");

        // Print the set
        System.out.println(stringSet);
    }
}

Output

[Apple, Banana, Cherry]

Summary

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

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How to create a Set of Strings in Java - Step by Step Examples

How to create a Set of Strings in Java ?

Answer

✐ Examples

1 Create Set of Strings using HashSet

Java Program

Output

2 Create Sorted Set of Strings using TreeSet

Java Program

Output

Summary

More Java Sets Tutorials