Java Tutorials and codes

Composition  "Have a " Relationship  OR  "Must have" relationship                    between two or more classes. Container class contains component's class object For example a  Car is composed of engine and body. Where Car is a container class and both Engine and Body are components class.  Life Time Issue in Composition Life time of component objects depends on container class If Container object destroyed, component objects will be also destroyed Car Example  There is a composition relationship between car's body and engine. Car must have Engine and body If Car destroyed, both Engine and Body will be destroyed class  Engine {   Engine  () {    System.out.println ( "Engine created" ) ; }   void  start () {    System.out.println ( "Engine Start" ) ;   } } class  Body...