The source code to create a singleton class with method name as that of the class is given below. The given program is compiled and executed successfully.
// Java program to create a singleton class with
// method name as that of class
class Singleton {
private static Singleton singleRef = null;
private Singleton() {}
public static Singleton Singleton() {
if (singleRef == null)
singleRef = new Singleton();
return singleRef;
}
}
class Main {
public static void main(String args[]) {
Singleton obj1 = Singleton.Singleton();
Singleton obj2 = Singleton.Singleton();
Singleton obj3 = Singleton.Singleton();
if (obj1 == obj2 && obj1 == obj3)
System.out.println("All object are pointing to the same memory location.");
else
System.out.println("All object are not pointing to the same memory location.");
}
}
Output:
All objects are pointing to the same memory location.
Explanation:
In the above program, we created a singleton class Singleton and public class Main. The Singleton class contains a static method with a class name that returns the instance of the class.
The Main class contains a static method main(). The main() is an entry point for the program. Here, we created the instances obj1, obj2, obj3 and compared all objects, and printed the appropriate message.
Program/Source Code:
The source code to create a singleton class with method name as that of the class is given below. The given program is compiled and executed successfully.
Output:
Explanation:
In the above program, we created a singleton class Singleton and public class Main. The Singleton class contains a static method with a class name that returns the instance of the class.
The Main class contains a static method main(). The main() is an entry point for the program. Here, we created the instances obj1, obj2, obj3 and compared all objects, and printed the appropriate message.