In Java, the new keyword is used to create new objects.There are three steps when creating an object from a class −If we compile and run the above program, then it will produce the following result −Instance variables and methods are accessed via created objects.

They are Employee and EmployeeTest.First open notepad and add the following code. To access an instance variable, following is the fully qualified path −This example explains how to access instance variables and methods of a class.If we compile and run the above program, then it will produce the following result −As the last part of this section, let's now look into the source file declaration rules. These rules are essential when declaring classes, There can be only one public class per source file.A source file can have multiple non-public classes.The public class name should be the name of the source file as well which should be appended by If the class is defined inside a package, then the package statement should be the first statement in the source file.If import statements are present, then they must be written between the package statement and the class declaration. The following example shows the usage of lang.Object.hashCode() method: Now, save this source file with the name Employee.java.The Employee class has four instance variables - name, age, designation and salary. Every class you use or write inherits the instance methods of Object. In this article, we will explore all Object Class methods with examples. If we consider the real-world, we can find many objects around us, cars, dogs, humans, etc. The java.lang.Object.equals(Object obj) indicates whether some other object is "equal to" this one. When developing applications in Java, hundreds of classes and interfaces will be written, therefore categorizing these classes is a must as well as makes life much easier.In Java if a fully qualified name, which includes the package and the class name is given, then the compiler can easily locate the source code or classes. the state are unique for each object.

We will be explaining about all these in the access modifiers chapter.Apart from the above mentioned types of classes, Java also has some special classes called Inner classes and Anonymous classes.In simple words, it is a way of categorizing the classes and interfaces. The java.lang.Object.hashCode() method returns a hash code value for the object. All the instances share the attributes and the behavior of the class. Object Class Methods in Java with Examples.

will be true, but these are not absolute requirements. Remember this is the Employee class and the class is a public class. Let us compile and run the above program, this will produce the following result − Notice that parent class reference variable can refer the child class object, know as upcasting.
will be true, this is not an absolute requirement. Let's override finalize() method from Object class into Person class and test it using main() method.

Let us compile and run the above program, this will produce the following result − The following example shows the usage of lang.Object.getClass() method. If we do not explicitly write a constructor for a class, the Java compiler builds a default constructor for that class.Each time a new object is created, at least one constructor will be invoked. It is not possible to declare different import and/or package statements to different classes in the source file.Classes have several access levels and there are different types of classes; abstract classes, final classes, etc. : for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified. By convention, the returned object should be obtained by calling super.clone. We will be creating a separate class for these tasks.In the next session, we will discuss the basic data types in Java and how they can be used when developing Java applications. Every class in Java is directly or indirectly derived from the Object class.