What can you return in Java?

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).

Can objects be returned 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.

When can return be used in Java?

A return statement is used to exit from a method, with or without a value. For methods that define a return type, the return statement must be immediately followed by a return value. For methods that don’t return a value, the return statement can be used without a return value to exit a method.

Can you return a variable in Java?

return; … Any method that is not declared void must contain a return statement with a corresponding return value, like this: return returnValue; The data type of the return value must match the method’s declared return type; you can’t return an integer value from a method declared to return a boolean.

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Can a string be returned in Java?

2 Answers. Your code is fine. There’s no problem with returning Strings in this manner. In Java, a String is a reference to an immutable object.

How do you return an object in Java?

“In order to return an object from a Java method, you must first declare a variable to hold a reference to the object.” So in this case, Ball is a variable that is a reference to the object. Correct? redBall is a reference to the object created by the new Ball(“red”) statement.

What is return method in Java?

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).

What does a return do?

A return statement ends the execution of a function, and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return statement can return a value to the calling function.

Does return print in Java?

No.. return statement will only return value. It will not print anything. If you want to print, store the returned value in a variable and print the variable or print the returned value directly.

What does return 1 do in Java?

What actually does it mean when it says return -1 in this method OR any other number ? It means the author of the method does not appreciate exceptions properly. They are probably used to programming in a language like C, where clients of a method are usually notified of errors through some special return value.

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How do you return a list in Java?

The list() method of java. util. Collections class is used to return an array list containing the elements returned by the specified enumeration in the order they are returned by the enumeration.

What does return 0 do in Java?

It is a keyword which is used to return some value, so it does not need any declaration.It needs only return keyword with value or variables. 4. Generally, return 0 is used to return exit code to the operating system. If we want to explicitly specify an exit code to the operating system, we have to use System.

How can I return two objects in Java?

Returning Multiple values in Java

  1. If all returned elements are of same type.
  2. If returned elements are of different types.
  3. Using Pair (If there are only two returned values) We can use Pair in Java to return two values.
  4. If there are more than two returned values. …
  5. Returning list of Object Class.

How do you write a return method in Java?

Let’s see a simple example to return integer value.

  1. public class ReturnExample1 {
  2. int display()
  3. {
  4. return 10;
  5. }
  6. public static void main(String[] args) {
  7. ReturnExample1 e =new ReturnExample1();
  8. System.out.println(e.display());

What is difference between return 0 and return1?

return 0: A return 0 means that the program will execute successfully and did what it was intended to do. return 1: A return 1 means that there is some error while executing the program and it is not performing what it was intended to do.

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