What are the main uses of this keyword?
The this keyword refers to the current object in a method or constructor.
The most common use of the this keyword is to eliminate the confusion between class attributes and parameters with the same name (because a class attribute is shadowed by a method or constructor parameter)..
What is the purpose of volatile keyword in Java?
The volatile modifier is used to let the JVM know that a thread accessing the variable must always merge its own private copy of the variable with the master copy in the memory. Accessing a volatile variable synchronizes all the cached copied of the variables in the main memory.
Is null a keyword in Java?
In Java, null is a reserved word for literal values. It seems like a keyword, but actually, it is a literal similar to true and false.
Is main keyword in Java?
Main is not a keyword in Java. When you try to execute a java code using “java” command, the runtime will load the public class that you are trying to execute and then call the main method defined in the class. The runtime knows that “main” is the method to look for as it is designed that way.
Why do we use keywords in Java?
static: Java static keyword is used to indicate that a variable or method is a class method. The static keyword in Java is used for memory management mainly. … super: Java super keyword is a reference variable that is used to refer parent class object. It can be used to invoke immediate parent class method.