J2ME in a Nutshell

Name

Object

Synopsis

This class that represent a Java object. Object is an ancestor of every Java class. Therefore, a variable of type Object can be safely assigned a reference to any Java object, array, or interface type without casting. In addition, the methods of this class can be invoked on all objects, arrays, and interface types.

The equals() method determines whether the current object is equal to the object passed in. The default case defines two objects as equivalent if they are the same object instance. However, most subclasses override this method and use it to test for byte-to-byte equivalence, instead of testing for the same object instance.

getClass() returns a Class object representing the object’s class or interface. hashCode() returns a hash code that can be used as a non-unique hashing key for the object. Note that invoking this method on different objects that are equivalent according to equals() must result in the same value being returned. Also, it is important to point out that two different objects may return the same hash code. Subclasses may override this method to return a hash code more suitable to particular object types. The value returned by the Object implementation of this method can always be obtained by calling the System.identityHashCode() method.

The wait() method provides a way for a thread to wait for a specific condition to be met. notify() and notifyAll() allow another thread to signal that either one waiter or all waiters should re-evaluate ...