Java Boolean toString() Method

The toString() method of Java Boolean class returns a String corresponding to this Boolean object. It returns a string value “true”, if the defined object is true else it returns false.

Syntax

1. public String toString()
2. public static String toString(boolean b)

Parameters

The parameter ‘b’ represents the Boolean argument to be converted in String.

Return Value

The toString() method returns the String depicting this Boolean value.

Example 1

public class JavaBooleanToStringMethodExample1 {
    //returns the string representation of the specified boolean
    public static void main(String[] args) {
        Boolean b1=true;
        String str= b1.toString();
        System.out.println(str);
  // returns the string representation of the specified boolean
        Boolean b2=false;
        String str1= b2.toString();
        System.out.println(str1);
    }
}

Output

true
false

Example 2

public class JavaBooleanToStringMethodExample2 {
      public static void main(String[] args) {
      Boolean b1 =null;
     //for null parameter it will return an exception
      String str= b1.toString();
      System.out.println(str);
      }
  }

Output

Exception in thread "main" java.lang.NullPointerException
            at com.interf.JavaBooleanToStringMethodExample2.main(BooleanToStringMethod
Example2.java:8)

Example 3

import java.util.Scanner;
public class JavaBooleanToStringMethodExample3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
            System.out.println("True/False:-\n Sun rises from west. ");
            System.out.print("Ans: ");
            Boolean b1 = scanner.nextBoolean();
            //calling static tpString() method
            if (Boolean.toString(b1) == "false") {
                System.out.println("Right Answer ");
            } else {
                System.out.println("Wrong Answer ");
            }
    }
}

Output

True/False:-
5 months have 30 days.
Ans: false
Right Answer

Example 4

public class JavaBooleanToStringMethodExample4 {
    public static void main(String[] args) {
        boolean b1 =false;
        System.out.println(b1);
        String str =b1.toString();
        System.out.println(str);
    }
}

Output

Error:(7, 23) java: boolean cannot be dereferenced