Messages

Messages are the communication mechanism between objects.

 

Messages enable one object to invoke an action (method) in another object.

 

Messages comprise of three components:

  1. The object being addressed
  2. The method to perform
  3. Any parameters required by the method

Carry on with the previous example, the messages can be seen on line 32:

 

objectA.set("Hello, ", "World!") ;

 

and similarly on line 34 (without parameters):

Compile & Run:

Hello, World!

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