Difference Between Method and Constructor

Difference Between Method and Constructor in Java

Costructor is the special member funtion of any class and it is call implicitly whenever object of class is created.

• The name of constructor must be same with the name of the Class but there is no such requirement for a method in Java.
• Constructor doesn't have any return type but the method has the return type and returns something unless its void. Constructors are chained and they are called in a particular order, there is no such facility for methods.
• Constructors are not inherited by child classes but methods are inherited by child classes until they are made private. Similarly private constructor means you can not create object of that class from outside, this is one of the technique used to implement Singleton pattern in Java.
• In Java this and super is used to call a constructor explicitly. no such thing as the method, they have their own name which can be used to call them.

Example Method and Constructor in Java

public class Customer
{ 
private int account;//data member 
private String name; 
private float amount; 
Customer() //constructor doesn't has return type
{
}
public void deposit(int amount) //method has return type
{
this.amount+=amount; 
} 
}

Difference between Method and Constructor in Java