Understanding the Java Boolean Class

The Java Boolean class wraps the primitive boolean type into an object. It allows for the creation of Boolean objects that can hold a true or false value, which is useful when dealing with collections that cannot store primitive data types directly.

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

The declaration for java.lang.Boolean class:


public final class Boolean
extends Object
implements Serializable, Comparable

Boolean Class Fields

static Boolean FALSE − The Boolean object corresponding to the primitive value false.
static Boolean TRUE − The Boolean object corresponding to the primitive value true.
static Class<Boolean> TYPE − The Class object representing the primitive type boolean.

Boolean Class Constructors

Constructor	Description
`Boolean(boolean value)`	Allocates a Boolean object representing the value argument.
`Boolean(String s)`	Allocates a Boolean object representing true if the string argument is "true" (case ignored).

Boolean Class Methods

Method	Description
`boolean booleanValue()`	Returns the value as a boolean primitive.
`int compareTo(Boolean b)`	Compares this Boolean instance with another.
`boolean equals(Object obj)`	Returns true if this object represents the same boolean value as the argument.
`static boolean getBoolean(String name)`	Returns true if the system property named by the argument is equal to "true".
`int hashCode()`	Returns a hash code for this Boolean object.
`int hashCode(boolean value)`	Returns a hash code for a given boolean value.
`static boolean logicalAnd(boolean a, boolean b)`	Returns the result of applying the logical AND operator to the specified boolean operands.
`static boolean logicalOr(boolean a, boolean b)`	Returns the result of applying the logical OR operator to the specified boolean operands.
`static boolean logicalXor(boolean a, boolean b)`	Returns the result of applying the logical XOR operator to the specified boolean operands.
`static boolean parseBoolean(String s)`	Parses the string argument as a boolean.
`String toString()`	Returns a String object representing this Boolean's value.
`static String toString(boolean b)`	Returns a String object representing the specified boolean.
`static Boolean valueOf(boolean b)`	Returns a Boolean instance representing the specified boolean value.
`static Boolean valueOf(String s)`	Returns a Boolean with a value represented by the specified string.

Example of Java Boolean Class

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


package com.tutorialsarena;

public class BooleanDemo {
public static void main(String[] args) {
Boolean b1, b2;

b1 = Boolean.valueOf(true);
b2 = Boolean.valueOf(false);

int res = b1.compareTo(b2);

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


Object value is true