return keyword in java

The "return" keyword causes a method to return to the method that called it, passing a value that matches the return type of the returning method.

In other words,

The return keyword is used to stop the execution of a method and return a value to the caller.

Example

return for a void method will stop the further execution of a method

  1.  public void displayName(String name)
  2.  {
  3.         System.out.println("Name -> "+name);
  4.         return;
  5.  }
 public void displayName(String name)
 {
        System.out.println("Name -> "+name);
        return;
 }


If the method has a non−void return type, the return statement must have an argument of the same or a compatible type as shown in below examples.

returning String from a method

  1.  public String getName()
  2.  {
  3.      String s = "Raj";
  4.      return s;
  5.  }
 public String getName()
 {
     String s = "Raj";
     return s;
 }

returning double from a method

  1.  public double getTotalAmount()
  2.  {
  3.      double d = 500.5;
  4.      return(d);
  5.  }
 public double getTotalAmount()
 {
     double d = 500.5;
     return(d);
 }

returning object from a method as below

  1. public Object getObject() {
  2.     Object object = new Object();
  3.            // some statements using object instance
  4.     return object;
  5. }
public Object getObject() {
    Object object = new Object();
           // some statements using object instance
    return object;
}

returning Custom object from a method as below

  1. public Customer getCustomer() {
  2.     Customer customer = new Customer();
  3.            // some statements using customer instance
  4.     return customer;
  5. }
public Customer getCustomer() {
    Customer customer = new Customer();
           // some statements using customer instance
    return customer;
}

returning Null from a method as below

  1. <strong></strong>
  2. public Customer getAdminCustomer(boolean isAdmin) {
  3. if(
  4.     Customer customer = new Customer();
  5.          // some statements using customer instance
  6.     return customer;
  7. }
<strong></strong>
public Customer getAdminCustomer(boolean isAdmin) {
if(
    Customer customer = new Customer();
         // some statements using customer instance
    return customer;
}


About the Author

Raj
Founder of javainsimpleway.com
I love Java and open source technologies and very much passionate about software development.
I like to share my knowledge with others especially on technology 🙂
I have given all the examples as simple as possible to understand for the beginners.
All the code posted on my blog is developed,compiled and tested in my development environment.
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