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How to Convert Boolean to String in Java? (Parse Bool to String)

In Java programming, data manipulation and transformation are fundamental tasks. One common scenario developers often encounter is the need to convert a boolean to string in Java. Whether you're working on a complex software application or a simple program, this operation is a crucial part of handling and displaying data.

This tutorial aims to help you understand how to parse boolean to string in Java. We will walk you through various methods and techniques, from the simplest to more advanced, ensuring that you have a solid understanding of how to accomplish this task effectively. 

By the end of this tutorial, you will have a clear grasp of the different approaches to perform boolean-to-string conversions in Java, and you'll be ready to implement them in your own projects. So, let's start learning!

Java Boolean to String Using String.valueOf()

Here's a Java program to convert boolean to string using the String.valueOf(booleanValue) method:

Code

public class BooleanToStringExample {
    public static void main(String[] args) {
        // Sample boolean value
        boolean isJavaFun = true;

        // Convert boolean to string using String.valueOf()
        String boolString = String.valueOf(isJavaFun);

        // Display the result
        System.out.println("Boolean as String: " + boolString);
    }
}

Output

Boolean as String: true

Explanation

  • We start by declaring a boolean variable named isJavaFun and initialize it with the value true. This boolean variable represents a simple condition, in this case, indicating that Java is fun.

  • Next, we use the String.valueOf(booleanValue) method to convert the isJavaFun boolean into a string. This method takes a boolean value as its argument and returns the string representation of that boolean, either "true" or "false."

  • The converted string, in this case, will be "true" since our boolean variable isJavaFun is true.

  • Finally, we print the converted string to the console using System.out.println(). As a result, the output displays "Boolean as String: true," indicating that the boolean value true has been successfully converted to the string "true."

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Convert Boolean to String in Java Using Boolean.toString()

Here's a Java program on how to convert boolean to string using the Boolean.toString(booleanValue) method:

Code

public class BooleanToStringExample {
    public static void main(String[] args) {
        // Sample boolean value
        boolean isJavaFun = true;

        // Convert boolean to string using Boolean.toString()
        String boolString = Boolean.toString(isJavaFun);

        // Display the result
        System.out.println("Boolean as String: " + boolString);
    }
}

Output

Boolean as String: true

Explanation

This program is very similar to the previous program, but it uses the Boolean.toString(booleanValue) method to convert the boolean to a string.

Java Boolean to String Using String.format("%b", booleanValue)

We can also parse boolean to string in Java using the String.format() method, as shown below:

Code

public class BooleanToStringExample {
    public static void main(String[] args) {
        // Sample boolean value
        boolean isJavaFun = true;

        // Convert boolean to string using String.format()
        String boolString = String.format("%b", isJavaFun);

        // Display the result
        System.out.println("Boolean as String: " + boolString);
    }
}

Output

Boolean as String: true

Explanation

  • In this method, we use concatenation (booleanValue + "") to convert the boolean to a string. Here, booleanValue is our boolean variable isJavaFun, and appending an empty string "" coerces the boolean into its string representation.

  • The converted string will be "true" since our boolean variable isJavaFun is true in both cases.