OOP java

OOP java

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  Java Object Oriented M Iqbal Al Ghazaly This beginner Java tutorial describes fundamentals of programming in the Java programming language.
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  OOP Object Oriented Programming(OOP) is a programming method that based from object. Small think from OOP is an object collection that interact with each other and excange an information Inheritance Polymorphism Abstraction Encapsulation
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  Inheritance A class thatis derived from another class is called a subclass . The class from which the subclass is derived is called a superclass .
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  Inheritance illustration
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  Polymorphism The word"polymorphism" means "many forms". It comes from Greek word "poly" (means many) and "morphos" (means form).
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  Polymorphism illustration
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  Abstraction Abstraction is avery important element of object oriented software development and is used in the design phase to find a suitable hierarchy for a set of classes. Abstraction refers to the ability to make a class abstract in OOP. An abstract class is one that cannot be instantiated. All other functionality of the class still exists, and its fields, methods, and constructors are all accessed in the same manner. You just cannot create an instance of the abstract class.
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  Encapsulation Encapsulation is oneof the four fundamental OOP concepts. The other three are inheritance, polymorphism, and abstraction. Synonym: information hiding Encapsulation is one of the most important characteristics of an object oriented system.
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  Repetition Control Structures Decisioncontrol structures are Java statements that allows us to select and execute specific blocks of code while skipping other sections. If statement Switch statement Repetition Control Structures
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  If statement The if-statementspecifies that a statement (or block of code) will be executed if and only if a certain boolean statement is true. Devided by 3,they are: If-else If-else-if If-else-else-if
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  Switch statement Another wayto indicate a branch is through the switch keyword. The switch construct allows branching on multiple outcomes.
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  switch( switch_expression ){ casecase_selector1: statement1; statement2; break; case case_selector2: statement1; statement2; break; default: statement1;statement2; break; }
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  Repetition Control Structures Repetitioncontrol structures are Java statements that allows us to execute specific blocks of code a number of times. There are three types of repetition control structures, the while, do-while and for loops.
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  While loop The while loop is a statement or block of statements that is repeated as long as some condition is satisfied. while( boolean_expression ){ statement1; statement2; ... }
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  do- while The do-whileloop is similar to the while-loop. The statements inside a do-while loop are executed several times as long as the condition is satisfied. do{ statement1; statement2; ... }while( boolean_expression );
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  For-loop The for loop,like the previous loops, allows execution of the same code a number of times. for (InitializationExpression; LoopCondition; StepExpression){ statement1; statement2; ... }
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  Arithmetic in java Arithmetichas a job such as mathematics, it uses for doing mathematic's operation, such as pluses, division, minuses, and times