notes on core java in java

After a thread is started, via its start() method or that of the Thread class, the JVM invokes the thread’srun() method when the thread is initially executed. In Java, a thread’s run() method is invoked when the thread is started using the start() method. The start() method is part of the Thread class and is used to begin the execution … Read more

Object. In Core Java, the immediate superclass of the MenuComponent class is the Object class. The Object class is the root class of the Java class hierarchy, and all classes in Java are directly or indirectly derived from the Object class. Therefore, if a class does not explicitly extend another class, it implicitly inherits from … Read more

The purpose of finalization is to give an unreachable object the opportunity to perform any cleanup processing before the object is garbage collected. In Java, finalization refers to the process of cleaning up resources or performing some specific actions before an object is garbage-collected. The finalize() method is a method of the Object class, and … Read more

MenuItem. In Core Java, the immediate superclass of the Menu class is the MenuItemContainer class. The Menu class is part of the Abstract Window Toolkit (AWT) package in Java, and it extends the MenuItemContainer class. The MenuItemContainer class, in turn, extends the MenuComponent class. So, the inheritance hierarchy is as follows: lua java.lang.Object | +– … Read more

An anonymous class may implement an interface or extend a superclass, but may not be declared to do both. Yes, in Java, an anonymous class can be declared as implementing an interface and extending a class simultaneously. This allows you to create a class on the fly that provides a specific implementation for an interface … Read more