Miscellaneous

How do you find the return type of a method?

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How do you find the return type of a method?

Get methods return type

  1. Get the array of Method objects reflecting all the methods declared by the class, using getDeclaredMethods() API method of Class.
  2. For all elements in the array get the return type for the method each object represents, using getReturnType() API method of Method.

What is the return type of method in Java?

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). For instance, if the return type of some method is boolean, we can not return an integer.

Can method have return type?

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

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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.

How do you return an object from a method 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.

How do you return a string in Java?

Using Only StringBuffer to Take and Return String Data in Java

  1. public static void main(String[] args) { // take input Scanner scan = new Scanner(System.in);
  2. String str = scan. nextLine();
  3. // Now, the return type is also StringBuffer.
  4. String reverseStr = new String(reversrSb);
  5. for(int i=sb.
  6. }

What is return keyword in Java?

In Java, return is a reserved keyword i.e, we can’t use it as an identifier. It is used to exit from a method, with or without a value.

How do you return a loop in Java?

  1. You can’t return more than once from a method.
  2. Use System.out.println in the loop; Use StringBuilder to concatenate the values from the loop into a single String.
  3. You’ll need to collect the results of your loop iterations into a Collection like ArrayList or Set and return that.
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How do you return an array of objects from a method in Java?

In the following example, the method returns an array of integer type.

  1. import java.util.Arrays;
  2. public class ReturnArrayExample1.
  3. {
  4. public static void main(String args[])
  5. {
  6. int[] a=numbers(); //obtain the array.
  7. for (int i = 0; i < a.length; i++) //for loop to print the array.
  8. System.out.print( a[i]+ ” “);

What is meant by returning an object from a method?

Returning a Value from a Method 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 . When returning an object, the returned object’s data type must be either a subclass of or the exact class indicated.

What are the return types in Java?

In Java, a method may return any type, but only one item of one type. The type could be aliased however. For example, all object classes are derived from java.lang.Object, so a method could return an instance of any class by declaring a return type of java.lang.Object.

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What are examples of methods in Java?

The standard library methods are built-in methods in Java that are readily available for use. These standard libraries come along with the Java Class Library ( JCL ) in a Java archive (*.jar) file with JVM and JRE. For example, print() is a method of java.io.PrintSteam.

What is return 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.

How to create a method in Java?

Open your text editor and create a new file. Type in the following Java statements:

  • Save your file as CreateAMethodInJava.java.
  • Open a command prompt and navigate to the directory containing your new Java program. Then type in the command to compile your program and hit Enter.
  • You can now test your Java program. Type in the command to run the Java runtime launcher and hit Enter. Observe the results of calling your method.