Java - Boolean toString() Method

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Description

The Java Boolean toString() returns a String object representing this Boolean's value. If this object represents the value true, a string equal to "true" is returned. Otherwise, a string equal to "false" is returned.

Declaration

Following is the declaration for java.lang.Boolean.toString() method

public String toString()

Overrides

toString in class Object

Parameters

NA

Return Value

This method returns a string representation of this object.

Exception

NA

Getting String Representation from a Boolean as true Example

The following example shows the usage of Boolean toString() method for a boolean object value as true. In this program, we've a Boolean variable with unerlying value as true and using toString() method, we're getting a String as "true" and then result is printed.

package com.tutorialspoint;

public class BooleanDemo {
   public static void main(String[] args) {

      // create 1 Boolean objects b1
      Boolean b1;

      // assign value to b1
      b1 = Boolean.valueOf(true);

      // create 1 String s1
      String s1;

      // assign string value of object b1 to s1
      s1 = b1.toString();

      String str1 = "String value of boolean object " + b1 + " is "  + s1;

      // print s1 value
      System.out.println( str1 );
   }
}

Output

Let us compile and run the above program, this will produce the following result −

String value of boolean object true is true

Getting String Representation from a Boolean as false Example

The following example shows the usage of Boolean toString() method for a boolean object value as false. In this program, we've a Boolean variable with unerlying value as false and using toString() method, we're getting a String as "false" and then result is printed.

package com.tutorialspoint;

public class BooleanDemo {
   public static void main(String[] args) {

      // create 1 Boolean objects b1
      Boolean b1;

      // assign value to b1
      b1 = Boolean.valueOf(false);

      // create 1 String s1
      String s1;

      // assign string value of object b1 to s1
      s1 = b1.toString();

      String str1 = "String value of boolean object " + b1 + " is "  + s1;

      // print s1 value
      System.out.println( str1 );
   }
}

Output

Let us compile and run the above program, this will produce the following result −

String value of boolean object false is false

Getting String Representation from a null Boolean Example

The following example shows the usage of Boolean toString() method for a null boolean object value. In this program, we've a Boolean variable with unerlying value as null and using toString() method, we're getting a String as "false" and then result is printed.

package com.tutorialspoint;
public class BooleanDemo {
   public static void main(String[] args) {

      // create 1 Boolean objects b1
      Boolean b1;

      // assign value to b1
      b1 = Boolean.valueOf(null);

      // create 1 String s1
      String s1;

      // assign string value of object b1 to s1
      s1 = b1.toString();

      String str1 = "String value of boolean object " + b1 + " is "  + s1;

      // print s1 value
      System.out.println( str1 );
   }
}

Output

Let us compile and run the above program, this will produce the following result −

String value of boolean object false is false