java.lang

Class Boolean

java.lang.Object

java.lang.Boolean

public final class Boolean
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static Boolean	FALSE FALSE
static Boolean	TRUE TRUE
static Class	TYPE TYPE

Constructor Summary

Constructors

Constructor and Description
Boolean(boolean flag) Boolean
Boolean(String s) Boolean

Method Summary

Modifier and Type	Method and Description
boolean	booleanValue()
boolean	equals(Object obj) Compares two Objects for equality.
static boolean	getBoolean(String s)
int	hashCode() Returns a hash code value for the object.
String	toString() Returns a string representation of the object.
static Boolean	valueOf(boolean b) Returns a Boolean instance representing the specified boolean value.
static Boolean	valueOf(String s)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TRUE

public static final Boolean TRUE

TRUE

FALSE

public static final Boolean FALSE

FALSE

TYPE

public static final Class TYPE

TYPE

Constructor Detail

Boolean

public Boolean(String s)

Boolean

Parameters:

s - ?

Boolean

public Boolean(boolean flag)

Boolean

Parameters:

flag - ?

Method Detail

booleanValue

public boolean booleanValue()

Returns:

?

equals

public boolean equals(Object obj)

Description copied from class: Object

Compares two Objects for equality.

The equals method implements an equivalence relation:

• It is reflexive: for any reference value x, x.equals(x) should return true.
• It is symmetric: for any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
• It is transitive: for any reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
• It is consistent: for any reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false.
• For any reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference values x and y, this method returns true if and only if x and y refer to the same object (x==y has the value true).

Overrides:

equals in class Object

Parameters:

obj - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

See Also:

hashCode(), Hashtable

getBoolean

public static boolean getBoolean(String s)

Parameters:

s - ?

Returns:

?

hashCode

public int hashCode()

Description copied from class: Object

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.

The general contract of hashCode is:

• Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer. This integer need not remain consistent from one execution of an application to another execution of the same application.
• If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable

toString

public String toString()

Description copied from class: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object.

Overrides:

toString in class Object

Returns:

a string representation of the object.

valueOf

public static Boolean valueOf(String s)

Parameters:

s - ?

Returns:

?

valueOf

public static Boolean valueOf(boolean b)

Returns a Boolean instance representing the specified boolean value. If the specified boolean value is true, this method returns Boolean.TRUE; if it is false, this method returns Boolean.FALSE.

Parameters:

b - a boolean value.

Returns:

a Boolean instance representing b.