Can a reference variable be returned from a method Java?

1) Yes, it returns a reference to the object. 2) If the method is private, then it can only be called from within the class itself.

What can be returned from a Java method?

A return statement causes the program control to transfer back to the caller of a method. Every method in Java is declared with a return type and it is mandatory for all java methods. A return type may be a primitive type like int, float, double, a reference type or void type(returns nothing).Jul 1, 2020

Does Java return by reference or value?

One of the biggest confusions in Java is whether it is pass by value or pass by reference. Java is always a pass by value; but, there are a few ways to achieve pass by reference: Making a public member variable in a class. Return a value and update it.

Can an object be returned from a method in Java?

In java, a method can return any type of data, including objects. For example, in the following program, the incrByTen( ) method returns an object in which the value of an (an integer variable) is ten greater than it is in the invoking object.Dec 27, 2021

Can a reference from an object be returned?

Explanation: This is possible but not always, since the reference being returned may get destroyed with the return of method. This is an undesirable condition, hence it is not always possible to return references.

How do you print in Java?

In Java, we usually use the println() method to print the statement. It belongs to the PrintStream class.

There are following three methods to print the statements:
  1. print() Method.
  2. println() Method.
  3. printf() Method.

What is a data type in Java?

Data types are divided into two groups: Primitive data types – includes byte , short , int , long , float , double , boolean and char. Non-primitive data types – such as String , Arrays and Classes (you will learn more about these in a later chapter)

How do you pass a reference in Python?

All parameters (arguments) in the Python language are passed by reference. It means if you change what a parameter refers to within a function, the change also reflects back in the calling function.

Why do we create methods in Java?

A Java method can perform some specific task without returning anything. Methods in Java allow us to reuse the code without retyping the code. In Java, every method must be part of some class that is different from languages like C, C++, and Python.

What is a static keyword in Java?

In Java, static keyword is mainly used for memory management. It can be used with variables, methods, blocks and nested classes. It is a keyword which is used to share the same variable or method of a given class. Basically, static is used for a constant variable or a method that is same for every instance of a class.

What is static function in Java?

In Java, a static method is a method that belongs to a class rather than an instance of a class. The method is accessible to every instance of a class, but methods defined in an instance are only able to be accessed by that object of a class.

Which is not a proper way to access public members of a class?

Which is not a proper way to access public members of a class? Explanation: The public members can be accessed anywhere in the program using the object of the class. And if object pointer is used, then arrow operator is used to access class members.

What is the difference between pointers and references in C++?

A pointer in C++ is a variable that holds the memory address of another variable. A reference is an alias for an already existing variable. Once a reference is initialized to a variable, it cannot be changed to refer to another variable. Hence, a reference is similar to a const pointer.

What is the use of keyword class?

class Java Keyword

The class keyword is used to declare a new Java class, which is a collection of related variables and/or methods. Classes are the basic building blocks of object−oriented programming. A class typically represents some real−world entity such as a geometric Shape or a Person.

How do you set up a scanner in Java?

Create a Scanner Object in Java

// read input from the input stream Scanner sc1 = new Scanner(InputStream input); // read input from files Scanner sc2 = new Scanner(File file); // read input from a string Scanner sc3 = new Scanner(String str);

How do you create a short variable in Java?

Example 1
  1. public class ShortExample1.
  2. {
  3. public static void main(String…k)
  4. {
  5. short num1=10;
  6. short num2=-10;
  7. System.out.println(“num1: “+num1);
  8. System.out.println(“num2: “+num2);

How do you create a method in Java?

Java Class Methods
  1. Example. Create a method named myMethod() in Main: public class Main { static void myMethod() { System. out. …
  2. Example. Inside main , call myMethod() : public class Main { static void myMethod() { System. …
  3. public class Main { public void fullThrottle() { System. out. …
  4. Second. java.

How is memory managed in Python?

Memory management in Python involves a private heap containing all Python objects and data structures. The management of this private heap is ensured internally by the Python memory manager.

How do you use pointers in Python?

Here are the steps that occur when this code is executed:
  1. Create Python object( 1000 )
  2. Assign the name x to that object.
  3. Create Python object ( 499 )
  4. Create Python object ( 501 )
  5. Add these two objects together.
  6. Create a new Python object ( 1000 )
  7. Assign the name y to that object.

How do we take input in Java?

Example of integer input from user
  1. import java.util.*;
  2. class UserInputDemo.
  3. {
  4. public static void main(String[] args)
  5. {
  6. Scanner sc= new Scanner(; // is a standard input stream.
  7. System.out.print(“Enter first number- “);
  8. int a= sc.nextInt();

How do you call a method from one project to another in Java?

  1. You should import the project two reference. – Fady Saad. …
  2. if you include the project into your class path, and properly import the class you will have no problem. …
  3. You need to tell Eclipse to link the 2nd project into the 1st one. …
  4. @Yohannes I get “SampleTwo cannot be resolved” on Eclipse. …
  5. Did you import the class ?

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