Convert Long to String in Java

In Java Programming, sometimes we need to change a number (like 5) into words (“five”). This guide is all about mastering this conversion – turning a Long number into a String. In the blog, we’ll explore two handy methods: String.valueOf() and Long.toString() to Convert Long to String.

How to Convert Long to String in Java?

Convert long to String by Using String.valueOf()

// Convert Long to String in Java
public class LongStringEx{  
    public static void main(String args[]){  
        long i=99984549L;  
        String s=String.valueOf(i);  
        System.out.println(s);  
    }
}  

Explanation of the code: 

Above Java program how to convert a `long` value to a `String` is explained below:

1. Class Declaration: The program begins by declaring a class named `LongStringEx`.

2. Main Method: Inside the main method, the execution of the program starts.

3. Variable Declaration: It declares a `long` variable named `i` and initializes it with a specific value.

4. Convert Long to String: The program then converts the `long` value to its string representation using a method provided by the `String` class.

5. Print Result: Finally, the program prints the resulting string representation of the `long` value to the console.

Output:

99984549

Convert long to String by Using Long.toString()

// Convert Long to String in Java
public class LongStringEx{  
    public static void main(String args[]){  
        long i=99984549L;  
        String s=Long.toString(i);  
        System.out.println(s);    
    }
}  

Explanation of Code:

This Java program exemplifies how to convert a `long` value to a `String` using the `Long.toString()` method:

1. Class Declaration: The code begins with the declaration of a class named `LongStringEx`.

2. Main Method: Inside the `main` method, the program’s execution initiates.

3. Variable Declaration:  It declares a `long` variable named `i` and initializes it with a specific value.

4. Convert Long to String: The program employs the `Long.toString()` method to convert the `long` value to its string representation.

5. Print Result: Finally, the resulting string representation of the `long` value is printed to the console.

Output:

99984549

Comparing String.valueOf() and Long.toString()

While both methods achieve the same goal of converting a long to a string, there are differences in their usage, performance, and readability.

	String.valueOf()	Long.toString()
Performance	– Internally delegates the conversion task to the corresponding toString() method of the input object.  – May incur slightly higher overhead compared to Long.toString() due to the additional method dispatching involved.	– Directly converts the long value to a string without any intermediate method dispatching.  – Generally exhibits better performance for long-to-string conversions, especially in performance-critical applications or high-frequency conversion scenarios.
Usage	-Converts various types of data to strings, including long values, by invoking the static valueOf() method of the String class. -Offers versatility by accepting different data types as input, making it convenient for general-purpose string conversions.	-Specifically designed for converting long values to strings by invoking the static toString() method of the Long class. -Provides a more specialized approach tailored for long-to-string conversions, which can enhance code clarity and maintainability in scenarios where only long values need to be converted.
Readability	– Offers a concise syntax and is often preferred for its simplicity and brevity.  – Can be advantageous in scenarios where readability and ease of understanding are paramount, especially in code sections with multiple conversions of different data types	– Explicitly indicates the intention to convert a long value to a string, which can enhance code readability and maintainability by providing clear semantic meaning.  – Particularly beneficial in codebases where clarity and explicitness are prioritized, aiding in code comprehension and future maintenance efforts.
When to Choose?	– Ideal for scenarios where the primary focus is on convenience and simplicity, such as quick conversions in simple utility methods or non-performance-critical code sections.  – Suitable when converting various data types to strings within the same code segment or when readability and brevity are preferred.	– Preferable when explicitness and performance efficiency are key considerations, especially in performance-sensitive applications or sections of code with frequent long-to-string conversions. Recommended for codebases where consistency and clarity in data conversions are prioritized, promoting maintainability and reducing the likelihood of errors.

Conclusion:

In conclusion, understanding the distinctions between String.valueOf() and Long.toString() empowers Java developers to make informed choices, optimizing code performance, readability, and maintainability.

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