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Java Boolean class toString() method with example

Boolean class toString() method: Here, we are going to learn about the toString() method of Boolean class with its syntax and example.
Submitted by Preeti Jain, on October 25, 2019

Syntax:

    public String toString();
    public static String toString(boolean value);

Boolean class toString() method

  • toString() method is available in java.lang package.
  • toString() method is used to represent String denoted by this Boolean object.
  • toString(boolean value) method is used to represent String denoted by the given argument of boolean type.
  • These methods don't throw an exception at the time of String representation.
  • toString() is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • toString(boolean value) is a static method, it is accessible with the class name too and, if we try to access these methods with the class object then also we will not get an error.

Parameter(s):

  • In the first case toString(), we don't pass any parameter or value.
  • In the second case toString(boolean value), we pass only one parameter of the boolean type it represents the boolean value to be converted.

Return value:

In the first case, the return type of this method is String - it returns the String representation of this Boolean object.

In the second case, the return type of this method is String - it returns the String representation of the given argument is of boolean type.

Note: If this Boolean object value is true, it returns the desired string true. Else, if this Boolean object value is not equal to true, it returns the desired string false.

Example:

// Java program to demonstrate the example 
// of toString() method of Boolean class

public class ToStringOfBooleanClass {
    public static void main(String[] args) {
        boolean b1 = true;
        boolean b2 = false;

        // Object initialization
        Boolean ob1 = new Boolean(b1);
        Boolean ob2 = new Boolean(b2);

        // Display ob1,ob2 values
        System.out.println("ob1:" + ob1);
        System.out.println("ob2:" + ob2);

        // It represents the string of this Boolean object
        String value1 = ob1.toString();

        // It represents the string of the given boolean parameter
        String value2 = Boolean.toString(ob2);

        // Display result values
        System.out.println("ob1.toString(): " + value1);
        System.out.println("Boolean.toString(ob2): " + value2);
    }
}

Output

ob1:true
ob2:false
ob1.toString(): true
Boolean.toString(ob2): false





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