How to return a class in java?

The getReturnType() method of Method class Every Method has a return type whether it is void, int, double, string or any other datatype. The getReturnType() method of Method class returns a Class object that represent the return type, declared in method at time of creating the method.

Can a class return itself Java?

A class will often return an instance of itself from what is sometimes called a “factory” method. In Java or C++ (etc) this would usually be a public static method, e.g. you would call it directly on the class rather than on an instance of a class.

Can a method return type be a class?

Essentially, a return type can be anything, if a method returns something. You can return the instance of the same class where the method is defined.

How do you call a return method in Java?

return is a reserved keyword in Java i.e, we can’t use it as an identifier. It is used to exit from a method, with or without a value. return can be used with methods in two ways: Methods returning a value : For methods that define a return type, return statement must be immediately followed by return value.

What is return in Java?

Java return keyword is used to complete the execution of a method. The return followed by the appropriate value that is returned to the caller. This value depends on the method return type like int method always return an integer value.

What is Java void?

void is a Java keyword. Used at method declaration and definition to specify that the method does not return any type, the method returns void . It is not a type and there is no void references/pointers as in C/C++.

What is self keyword in Java?

In some languages, for example C++ and Java, this or self is a keyword, and the variable automatically exists in instance methods. In others, for example Python, Rust, and[Perl 5, the first parameter of an instance method is such a reference. It needs to be specified explicitly.

Does Java have self?

While Java doesn’t have self types, there is a way to emulate them with generics. … Simple (almost), we just add THIS as a type parameter and have inheriting classes specify their own type as THIS .

What is method chaining in Java?

Method Chaining is the practice of calling different methods in a single line instead of calling different methods with the same object reference separately. … As object reference is returned by the constructor, we can use the returned object reference for calling another method as well.

Is void a return type?

Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so.

What is the return type () method?

A method returns to the code that invoked it when it completes all the statements in the method, reaches a return statement, or throws an exception, whichever occurs first. You declare a method’s return type in its method declaration. Within the body of the method, you use the return statement to return the value.

Can we return nothing in Java?

In Java, a null value can be assigned to an object reference of any type to indicate that it points to nothing. The compiler assigns null to any uninitialized static and instance members of reference type. In the absence of a constructor, the getArticles() and getName() methods will return a null reference.

How do I fix a missing return in Java?

In order to solve the missing return statement error, we simply need to add the return statement to the method just like to the one we did in case one. So, we will return the some value of the same type which we used before the name like as: public static String checkNumber( int number) {

What is return without value in Java?

Java requires that a method declare the data type of the value that it returns. If a method does not return a value, it must be declared to return void .

What does return 1 do in Java?

What return -1 means depends on the method. In this case, it means that a char encountered is not between (including) zeroAscii and nineAscii. It depends on the semantic of the function.