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How to Convert String to Boolean in Java? 3 Ways With Program

When we talk about programming, the data comes in many forms, and one of the most common data types is the boolean. Booleans represent the two fundamental states of true and false, and they play a crucial role in decision-making within Java and many other programming languages. However, there are situations where you might need to convert other data types, such as strings, into booleans to facilitate this decision-making process.

Learning how to convert string to boolean in Java can be particularly useful when dealing with user inputs, configuration files, or data from external sources, where information is often represented as text. Fortunately, Java provides straightforward methods and techniques to perform this conversion seamlessly.

In this tutorial, we will explore various methods to convert strings to booleans in Java. 

Let's dive in and learn it in simple terms with examples.

String to Boolean in Java Using Boolean.toString()

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

Code

public class BooleanToStringExample {
    public static void main(String[] args) {
        // Define a boolean variable
        boolean isJavaFun = true;

        // Convert the boolean to a string using Boolean.toString()
        String result = Boolean.toString(isJavaFun);

        // Output the result
        System.out.println("Is Java fun? " + result);
    }
}

Output

Is Java fun? true

Explanation

  • We start by defining a boolean variable named isJavaFun and initialize it to true. This boolean represents whether Java is fun (in our example, it is!).

  • Next, we use the Boolean.toString() method to convert the boolean isJavaFun to a string. This method takes a boolean value as input and returns its string representation.

  • We store the result of the conversion in a string variable named result.

  • Finally, we print the result using System.out.println(). 

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

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

Code

public class BooleanToStringExample {
    public static void main(String[] args) {
        // Define a boolean variable
        boolean isJavaFun = true;

        // Convert the boolean to a string using String.valueOf()
        String result = String.valueOf(isJavaFun);

        // Output the result
        System.out.println("Is Java fun? " + result);
    }
}

Output

Is Java fun? true

Explanation

We start by defining a boolean variable named isJavaFun and initialize it to true. This boolean represents whether Java is fun (in our example, it is!).

Next, we use the String.valueOf() method to convert the boolean isJavaFun to a string. This method takes various data types as input and returns their string representation. In this case, we pass the boolean isJavaFun as the input.

We store the result of the conversion in a string variable named result.

Finally, we print the result using System.out.println().

Java Boolean to String Using Ternary Operator

Here's a program on how to convert a bool to a string using the ternary operator in Java (? :):

Code

public class BooleanToStringExample {
    public static void main(String[] args) {
        // Define a boolean variable
        boolean isJavaFun = true;

        // Convert the boolean to a string using a ternary operator
        String result = (isJavaFun) ? "true" : "false";

        // Output the result
        System.out.println("Is Java fun? " + result);
    }
}

Output

Is Java fun? true

Explanation

We use a ternary operator (? :) to conditionally assign a string value to the result variable based on the value of the boolean isJavaFun. If isJavaFun is true, the ternary operator evaluates to "true", and if isJavaFun is false, it evaluates to "false".

We store the result of the ternary operation in a string variable named result.

Finally, we print the result using System.out.println().