Answer Posted / ranganathkini

A Singleton is a class which at any given time has only one
instance and it does not allow more instances to be created.
Such classes do not have an accessible constructor, for example:

public class Singleton {
// class is automatically instantiated when the
// class is loaded
private static Singleton instance = new Singleton()

// constructor is made inaccessible by declaring
// it private
private Singleton() { ... }

// Access to the single instance of the class is
// provided by a static accessor method
public static Singleton getInstance() {
// returns a reference of the private instance
return instance;
}

// rest of the class implementation
}

What is the difference between private & public & friendly classes?

752

---

What is the symbol for line break?

807

---

Is string is a keyword in java?

721

---

What is bitwise complement?

699

---

Is java map thread safe?

684

---

---

What are the benefits of java?

755

---

What is boolean example?

708

---

Class c implements interface I containing method m1 and m2 declarations. Class c has provided implementation for method m2. Can I create an object of class c?

1240

---

What is heterogeneous in java?

690

---

Difference between start() and run() method of thread class?

780

---

What is a Presistent Object?

888

---

What is the use of coding?

707

---

Differentiate between a constructor and a method? Can we mark constructors final?

908

---

Is the milky way in a void?

723

---

How do you clear an arraylist in java?

680

---