What are Methods in Java? || Instance Method in java.

INSTANCE METHOD 

📝What are Methods in Java: -  

• A method is a collection of statements that perform some specific task and return the result to the caller. 
• A method can perform some specific task without returning anything. Methods allow us to reuse the code without retyping the code. 
• In Java, every method must be part of some class which is different from languages like C, C++, and Python.  
• Methods are time savers and help us to reuse the code without retyping the code. 

◾Syntax of Method in java:

 return_type MethodName ()   
 {   
   // Body of the Method/logic/implementation return statement;   
 }   

◾Examples (1):

 class Dog{  
      void run()  
      {  
           //Body of the Method/logic/implementation (better word)  
      }  
 }  
📢// Return Nothing Because Void doesn't have any return type  

◾Examples (2):

 class Tap{  
      Water open()  
      {  
           //Body of the Method/logic/Implementation  
           return statement;  
      }  
 }  
 class water{  
 }  
📢//Return "Water"  

◾Examples (3):

 class Conductor{  
      Ticket issue() {  
           //Body of Method/logic/Implementation  
      }  
 }  
 class Ticket{  
 }  
📢//Returns "Ticket"  

◾Examples (4):

 class Shop{  
      Product sell() {  
           //Body of the Method/logic/Implementation  
           return statement;  
      }  
 }  
 class Product{  
 }  
📢//Returns "Product"  

📝Rules for Methods in java:- 

• Methods must have either return type or void but not both. 
• Void method cannot return any data. 
• A method can have only one return type or only one return statement.  
• The return type of method and the returning value must match. 
• Inside a method, the return statement must be the last executable statement in java.  

Return type means the data type of returning the value. 

◾Examples (1):

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• Here ‘t’ is called a local reference variable. 

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• A Method gets executed only when we invoke it.
• A Method can be invoked multiple times.
• The main method is not required for compilation rather required for execution. 

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