The compareTo() method of Boolean class is a built in method in Java which is used to compare the given Boolean instance with the current instance.
Syntax:
BooleanObject.compareTo(Boolean a)
Parameters: It takes a Boolean value a as parameter which is to be compared with the current instance.
Return Type: The return type of the function is int. It returns:
- 0 if ‘a’ is equal to ‘b’,
- a negative value if ‘a’is false and ‘b’ is true,
- a positive value if ‘a’ is true and ‘b’ is false.
Below are programs to illustrate the compareTo() method of Boolean class:
Program 1:
// Java code to implement// compareTo() method of Boolean class  class Lazyroar {      // Driver method    public static void main(String[] args)    {          // Boolean object        Boolean a = new Boolean(true);          // Boolean object        Boolean b = new Boolean(true);          // compare method        System.out.println(a + " comparing with " + b                           + " = " + a.compareTo(b));    }} |
Output:
true comparing with true = 0
Program 2:
// Java code to implement// compareTo() method of Java class  class Lazyroar {      // Driver method    public static void main(String[] args)    {          // Boolean object        Boolean a = new Boolean(true);          // Boolean object        Boolean b = new Boolean(false);          // compare method        System.out.println(a + " comparing with " + b                           + " = " + a.compareTo(b));    }} |
Output:
true comparing with false = 1
Program 3:
// Java code to implement// compareTo() method of Java class  class Lazyroar {      // Driver method    public static void main(String[] args)    {          // Boolean object        Boolean a = new Boolean(false);          // Boolean object        Boolean b = new Boolean(true);          // compare method        System.out.println(a + " comparing with " + b                           + " = " + a.compareTo(b));    }} |
Output:
false comparing with true = -1
