complete tutorials on core java in java

A dead thread cannot be restarted. In Java, once a thread has completed its execution and reaches the end of its run method or the thread’s run method terminates, the thread is considered dead and cannot be restarted. If you need to perform a task again, you would typically create a new instance of the … Read more

Overridden methods must have the same name, argument list, and return type. The overriding method may not limit the access of the method it overrides. The overriding method may not throw any exceptions that may not be thrown by the overridden method. In Java, there are certain restrictions and rules placed on method overriding. Here … Read more

All AWT event listeners extend the java.util.EventListener interface. In Core Java, AWT (Abstract Window Toolkit) event listeners typically extend interfaces provided by the java.awt.event package. The most commonly used interface for AWT event listeners is the ActionListener interface. So, the correct answer to your question would be: ActionListener interface is extended by AWT event listeners.

A compilation unit is a Java source code file. In the context of Core Java, a compilation unit refers to a source code file. It is the basic unit of compilation, typically containing a single Java class. A compilation unit can also include interface definitions, enumeration definitions, and annotation types. The Java compiler processes each … Read more

this is used to refer to the current object instance. super is used to refer to the variables and methods of the superclass of the current object instance. In Java, this and super are keywords used to refer to the current object and the parent class respectively. Here’s how they are used: this keyword: It refers to … Read more