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 meant by string is immutable?

527

---

What are extraneous variables examples?

539

---

What are abstract methods in java?

658

---

How we can declare a static variable?

658

---

Explain the difference between abstract class and interface in java?

541

---

---

Can you pass functions in java?

578

---

Is set ordered in java?

576

---

Can we extend immutable class?

541

---

What are methods and how are they defined?

607

---

What is the purpose of java?

564

---

What does s mean in regex?

557

---

How do you use compareto method?

544

---

How thread scheduler schedule the task?

593

---

What is a protected void?

512

---

What is a wrapper method?

541

---