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
| Sr.No. | Constructor & Description |
|---|---|
| 1 |
Boolean(boolean value) This allocates a Boolean object representing the value argument. |
| 2 |
Boolean(String s) This allocates a Boolean object representing the value true if the string argument is not null and is equal, ignoring case, to the string “true”. |
Boolean Class Methods
| Sr.No. | Method & Description |
|---|---|
| 1 |
This method returns the value of this Boolean object as a boolean primitive. |
| 2 |
This method compares this Boolean instance with another. |
| 3 |
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 |
This method returns true if and only if the system property named by the argument exists and is equal to the string “true”. |
| 5 |
This method returns a hash code for this Boolean object. |
| 6 |
This method returns a hash code for a given boolean value. It is compatible with Boolean.hashCode(). |
| 7 |
This method returns the result of applying the logical AND operator to the specified boolean operands. |
| 8 |
This method returns the result of applying the logical OR operator to the specified boolean operands. |
| 9 | static boolean logicalXor(boolean a, boolean b)
This method returns the result of applying the logical XOR operator to the specified boolean operands. |
| 10 |
This method parses the string argument as a boolean. |
| 11 |
This method returns a String object representing this Boolean”s value. |
| 12 |
This method returns a String object representing the specified boolean. |
| 13 |
This method returns a Boolean instance representing the specified boolean value. |
| 14 |
This method returns a Boolean with a value represented by the specified string. |
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