OOP java

May 2, 2012Download as ODP, PDF6 likes17,019 views

This document provides an overview of object-oriented programming concepts in Java including inheritance, polymorphism, abstraction, and encapsulation. It also discusses control structures like if/else statements and switches as well as repetition structures like while, do-while, and for loops. Arithmetic operations in Java like addition, subtraction, multiplication, and division are also mentioned.

Java Object Oriented

M Iqbal Al Ghazaly

This beginner Java tutorial describes fundamentals of
programming in the Java programming language.

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

Inheritance

A class that is derived from another class is
called a subclass . The class from which the
subclass is derived is called a superclass .

Polymorphism

The word "polymorphism" means "many
forms". It comes from Greek word "poly"
(means many) and "morphos" (means form).

Abstraction

Abstraction is a very 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.

Encapsulation
Encapsulation is one of 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.

Repetition Control Structures
Decision control 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

If statement
The if-statement specifies 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

Switch statement

Another way to indicate a branch is through the
switch keyword. The switch construct allows
branching on multiple outcomes.

$switch( switch_expression ){ case case_selector1: statement1; statement2; break; case case_selector2: statement1; statement2; break; default: statement1;statement2; break; }$

Repetition Control Structures
Repetition control 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.

$While loop The while loop is a statement or block of statements that is repeated as long as some condition is satisfied. while( boolean_expression ){ statement1; statement2; ... }$

$do- while The do-while loop is similar to the while-loop. The statements inside a do-while loop are executed several times as long as the condition is satisfied. do{ statement1; statement2; ... }while( boolean_expression );$

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;
...
}

Arithmetic in java

Arithmetic has a job such as mathematics, it uses for
doing mathematic's operation, such as pluses,
division, minuses, and times

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Introduction All the materials around us are made up of elements. These elements can be broadly divided into two major groups: Metals Non-Metals Each group has its own unique physical and chemical properties. Let's understand them one by one. Physical Properties 1. Appearance Metals: Shiny (lustrous). Example: gold, silver, copper. Non-metals: Dull appearance (except iodine, which is shiny). 2. Hardness Metals: Generally hard. Example: iron. Non-metals: Usually soft (except diamond, a form of carbon, which is very hard). 3. State Metals: Mostly solids at room temperature (except mercury, which is a liquid). Non-metals: Can be solids, liquids, or gases. Example: oxygen (gas), bromine (liquid), sulphur (solid). 4. Malleability Metals: Can be hammered into thin sheets (malleable). Non-metals: Not malleable. They break when hammered (brittle). 5. Ductility Metals: Can be drawn into wires (ductile). Non-metals: Not ductile. 6. Conductivity Metals: Good conductors of heat and electricity. Non-metals: Poor conductors (except graphite, which is a good conductor). 7. Sonorous Nature Metals: Produce a ringing sound when struck. Non-metals: Do not produce sound. Chemical Properties 1. Reaction with Oxygen Metals react with oxygen to form metal oxides. These metal oxides are usually basic. Non-metals react with oxygen to form non-metallic oxides. These oxides are usually acidic. 2. Reaction with Water Metals: Some react vigorously (e.g., sodium). Some react slowly (e.g., iron). Some do not react at all (e.g., gold, silver). Non-metals: Generally do not react with water. 3. Reaction with Acids Metals react with acids to produce salt and hydrogen gas. Non-metals: Do not react with acids. 4. Reaction with Bases Some non-metals react with bases to form salts, but this is rare. Metals generally do not react with bases directly (except amphoteric metals like aluminum and zinc). Displacement Reaction More reactive metals can displace less reactive metals from their salt solutions. Uses of Metals Iron: Making machines, tools, and buildings. Aluminum: Used in aircraft, utensils. Copper: Electrical wires. Gold and Silver: Jewelry. Zinc: Coating iron to prevent rusting (galvanization). Uses of Non-Metals Oxygen: Breathing. Nitrogen: Fertilizers. Chlorine: Water purification. Carbon: Fuel (coal), steel-making (coke). Iodine: Medicines. Alloys An alloy is a mixture of metals or a metal with a non-metal. Alloys have improved properties like strength, resistance to rusting.

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OOP java

1. Java Object Oriented M Iqbal Al Ghazaly This beginner Java tutorial describes fundamentals of programming in the Java programming language.

2. 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

3. Inheritance A class that is derived from another class is called a subclass . The class from which the subclass is derived is called a superclass .

4. Inheritance illustration

5. Polymorphism The word "polymorphism" means "many forms". It comes from Greek word "poly" (means many) and "morphos" (means form).

6. Polymorphism illustration

7. Abstraction Abstraction is a very 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.

8. Encapsulation Encapsulation is one of 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.

9. Repetition Control Structures Decision control 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

10. If statement The if-statement specifies 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

11. Switch statement Another way to indicate a branch is through the switch keyword. The switch construct allows branching on multiple outcomes.

12. switch( switch_expression ){ case case_selector1: statement1; statement2; break; case case_selector2: statement1; statement2; break; default: statement1;statement2; break; }

13. Repetition Control Structures Repetition control 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.

14. 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; ... }

15. do- while The do-while loop 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 );

16. 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; ... }

17. Arithmetic in java Arithmetic has a job such as mathematics, it uses for doing mathematic's operation, such as pluses, division, minuses, and times

OOP java

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