Java string endsWith() Method

Posted in Java Tutorial

Updated on Jan 14, 2024

By Mari Selvan

👁️ 36 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In Java programming, working with strings is a common and fundamental task.

The endsWith() method is a built-in string method that allows you to check whether a string ends with a specified suffix.

In this tutorial, we'll explore the usage and functionality of the endsWith() method in Java.

💡 Syntax

The syntax for the endsWith() method is as follows:

Syntax

Copied

public boolean endsWith(String suffix);

suffix: The substring that you want to check if the string ends with.

📄 Example

Let's dive into some examples to illustrate how the endsWith() method works.

EndsWithExample.java

Copied

public class EndsWithExample {
  public static void main(String[] args) {
    String str = "Hello, World!";

    // Check if the string ends with "World!"
    boolean result1 = str.endsWith("World!");
    System.out.println("Example 1: " + result1); // Output: true

    // Check if the string ends with "Java"
    boolean result2 = str.endsWith("Java");
    System.out.println("Example 2: " + result2); // Output: false
  }
}

💻 Output

Output

Example 1: true
Example 2: false

🧠 How the Program Works

In Example 1, the endsWith() method checks if the string "Hello, World!" ends with the specified suffix "World!" and prints the result, which is true.

In Example 2, the method checks if the string ends with "Java" and prints the result, which is false.

↩️ Return Value

The endsWith() method returns a boolean value. It is true if the string ends with the specified suffix; otherwise, it is false.

📚 Common Use Cases

The endsWith() method is useful when you need to perform conditional operations based on the ending of a string. It's commonly used to check file extensions, validate user input, or filter strings based on specific criteria.

📝 Notes

The comparison is case-sensitive. If you need a case-insensitive check, consider converting both the string and the suffix to lowercase (or uppercase) using the toLowerCase() or toUpperCase() methods before calling endsWith().
The endsWith() method is particularly handy when working with file paths to ensure that a file has a specific extension.

🎢 Optimization

The endsWith() method is already optimized for efficiency. However, if you are dealing with extremely long strings or need to perform the check in a performance-critical section of your code, consider other optimization strategies or algorithms depending on your specific use case.

🎉 Conclusion

The endsWith() method in Java provides a straightforward way to check whether a string ends with a specified suffix. It enhances the readability and conciseness of your code when performing such checks.

Feel free to experiment with different strings and suffixes to deepen your understanding of the endsWith() method. Happy coding!