Java.lang Boolean Class

Introduction

The java.lang.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.

Class declaration

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

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

Field

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.

Class constructors

S.N.	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".

Class methods

S.N.	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.
8	static String toString(boolean b) This method returns a String object representing the specified boolean.
9	static Boolean valueOf(boolean b) This method returns a Boolean instance representing the specified boolean value.
10	static Boolean valueOf(String s) 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