Objects that subclass the Observable class maintain a list of observers. When anObservable object is updated it invokes the update() method of each of its observers tonotify the observers that it has changed
Latest Answer : Observer observe only those class which are Observable. ...
With respect to multithreading, synchronization is the capability to control the access ofmultiple threads to shared resources. Without synchronization, it is possible for onethread to modify a shared
Latest Answer : Synchronization is the mechanism that ensures that only one thread is accessed the resources at a time. In a practical point of view assume that two threads are trying to update bank balance at the same time!!! How we can solve this issue the answer is sychronization. ...
Yes, a lock can be acquired on a class. This lock is acquired on the class's Class object..
Latest Answer : As your might already know, any synchronisation needs an object (monitor) to acquire lock one. See below for the three different types on how to synchronise code.public class A{ // A monitor object of sycnhronising piece of code. private ...
The setLayout() method is used to specify a container's layout.
When a thread terminates its processing, it enters the dead state.
Latest Answer : the thread enters the 'TERMINATED' state. at this point, the thread is not accessible ...
setBounds()
Latest Answer : component.setBounds(-,-,-,-); ...
When a task invokes its yield() method, it returns to the ready state. When a task invokesits sleep() method, it returns to the waiting state.
Latest Answer : yield method is mainly used to release the lock of resource and pull up in to steady state from wait pool. Sleep() will pull the thread to sleep for the given time. It will throws exception while trying to intrupt in b/w the sleep state ...
An object's finalize() method cannot be invoked by the garbage collector while the objectis still reachable. However, an object's finalize() method may be invoked by otherobjects.
Latest Answer : No, reachable obejcts can not be garbage collected ...
The readLine() method returns null when it has reached the end of a file.
Latest Answer : readLine() method of BufferReader class returns String and when it reaches the end of file file it returns null. ...
A native method is a method that is implemented in a language other than Java.
Latest Answer : Informs the compiler that the method has been used in a non-java platform and used only with the methods. ...
