Boolean

Boolean

java.lang

---

Java 1.0

serializable comparable

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  ( );   }