Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

This class
provides an immutable object wrapper around the
boolean primitive type. Note that the
trUE and FALSE constants are
Boolean objects; they are not the same as the
TRue and false
boolean values. As of Java 1.1, this class defines
a Class constant that represents the
boolean type. booleanValue( )
returns the boolean value of a
Boolean object. The class method
getBoolean( ) retrieves the
boolean value of a named property from the system
property list. The static method valueOf( ) parses
a string and returns the Boolean object it
represents. Java 1.4 added two static methods that convert primitive
boolean values to Boolean and
String objects. In Java 5.0, the
parseBoolean( ) method behaves like
valueOf( ) but returns a primitive
boolean value instead of a
Boolean object.

Prior to Java 5.0, this class does not implement the
Comparable interface.

Figure 10-7. java.lang.Boolean

public final class

Boolean implements Serializable, Comparable<Boolean> {
// Public Constructors
public

Boolean (String

s );
public

Boolean (boolean

value );
// Public Constants
public static final Boolean

FALSE ;
public static final Boolean

TRUE ;

1.1 public static final Class<Boolean>

TYPE ;
// Public Class Methods
public static boolean

getBoolean (String

name );

5.0 public static boolean

parseBoolean (String

s );

1.4 public static String

toString (boolean

b );

1.4 public static Boolean

valueOf (boolean

b );
public static Boolean

valueOf (String

s );
// Public Instance Methods
public boolean

booleanValue ( );
// Methods Implementing Comparable

5.0 public int

compareTo (Boolean

b );
// Public Methods Overriding Object
public boolean

equals (Object

obj );
public int

hashCode ( );
public String

toString ( );
}