The return keyword is used to return from a method when its execution is complete. When a return statement is reached in a method, the program returns to the code that invoked it.
A method can return a value or reference type or does not return a value. If a method does not return a value, the method must be declared void and it doesn’t need to contain a return statement.
If a method declare to return a value, then it must use the return statement within the body of method. The data type of the return value must match the method’s declared return type.
package org.kodejava.basic;
public class ReturnDemo {
public static void main(String[] args) {
int z = ReturnDemo.calculate(2, 3);
System.out.println("z = " + z);
Dog dog = new Dog("Spaniel", "Doggie");
System.out.println(dog.getDog());
}
public static int calculate(int x, int y) {
// return an int type value
return x + y;
}
public void print() {
System.out.println("void method");
// it does not need to contain a return statement, but it
// may do so
return;
}
public String getString() {
return "return String type value";
// try to execute a statement after return a value will
// cause a compile-time error.
//
// String error = "error";
}
}
class Dog {
private String breed;
private String name;
Dog(String breed, String name) {
this.breed = breed;
this.name = name;
}
public Dog getDog() {
// return Dog type
return this;
}
public String toString() {
return "breed: " + breed.concat("name: " + name);
}
}
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