The 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.
Following are the fields of the 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.
Following are some of the methods of the Boolean class−
Sr.No. | Method & Description |
---|---|
1 | boolean booleanValue() This method returns the value of this Boolean object as a boolean primitive |
2 | int compareTo(Boolean b) This method compares this Boolean instance with another. |
3 | boolean equals(Object obj) This method returns true if and only if the argument is not null and is a Boolean object that represents the same boolean value as this object. |
4 | static boolean getBoolean(String name) This method returns true if and only if the system property named by the argument exists and is equal to the string "true". |
5 | int hashCode() This method returns a hash code for this Boolean object. |
6 | static boolean parseBoolean(String s) This method parses the string argument as a boolean. |
7 | String toString() This method returns a String object representing this Boolean's value. |
Let us now see an example −
Example
import java.lang.*; public class Demo { public static void main(String[] args){ Boolean val1, val2; val1 = new Boolean(true); val2 = new Boolean(true); boolean res = val1.equals(val2); System.out.println("Are both the Boolean values equal? = "+res); } }
Output
Are both the Boolean values equal? = true
Let us now see another example−
Example
import java.lang.*; public class Demo { public static void main(String[] args){ Boolean val1, val2; val1 = new Boolean(false); val2 = new Boolean(true); System.out.println("Value1 = "+val1); System.out.println("Value2 = "+val2); System.out.println("HashCode Value1 = "+val1.hashCode()); System.out.println("HashCode Value2 = "+val2.hashCode()); boolean res = val1.equals(val2); System.out.println("Are both the Boolean values equal? = "+res); } }
Output
Value1 = false Value2 = true HashCode Value1 = 1237 HashCode Value2 = 1231 Are both the Boolean values equal? = false