Java - Boolean class

Java Boolean Class

The Java Boolean class wraps a value of the primitive type boolean in an object. An object of type Boolean contains a single field whose type is boolean.

Boolean Class Declaration in Java

Following is the declaration for java.lang.Boolean class −

public final class Boolean
   extends Object
      implements Serializable, Comparable<Boolean>

Boolean Class Fields

Following are the fields for java.lang.Boolean class −

• static Boolean FALSE − This is the Boolean object corresponding to the primitive value false.

• static Boolean TRUE − This is the Boolean object corresponding to the primitive value true.

• static Class<Boolean> TYPE − This is the Class object representing the primitive type boolean.

Boolean Class Constructors

Boolean Class Methods

Methods Inherited

This class inherits methods from the following classes −

• java.lang.Object

Example of Java Boolean Class

The following example shows the usage of some important methods provided by Boolean class.

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

      // create 2 Boolean objects b1, b2
      Boolean b1, b2;

      // assign values to b1, b2
      b1 = Boolean.valueOf(true);
      b2 = Boolean.valueOf(false);

      // create an int res
      int res;

      // compare b1 with b2
      res = b1.compareTo(b2);

      String str1 = "Both values are equal ";
      String str2 = "Object value is true";
      String str3 = "Argument value is true";
      if( res == 0 ) {
      	System.out.println( str1 );
      } else if( res > 0 ) {
         System.out.println( str2 );
      } else if( res < 0 ) {
         System.out.println( str3 );
      }
   }
}

Output

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

Object value is true