java training in ahmedabad

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Decision Making and Branching

• Created By Bhoomi Shah
• Java and Advanced Java Trainer At VaaYaa Education

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Conditional Statements

• IF
• IF Else
• Else If
• Switch
• IF
• Syntax if(condition)
• Statements
• Example If(no1gtno2)
• Printf (Number 1 is big)

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Continue....

• If else
• Syntax
• If(Condition)
• Statement
• Else
• statement

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Example

• If(no1gtno2)
• printf(No1 is big)
• Else
• printf(No2 is small)

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Else If

• If(condition 1)
• Statement1
• Elseif(condition 2)
• Statement2
• Elseif(condition 3)
• Statement3
• Elseif(condition 4)
• Statement4
• Else
• Statement 5

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Example

• If(code1)
• colourred
• Else if(code2)
• Colour blue
• Else if(code3)
• Colouryellow
• Else
• Colourwhite

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Switch Statement

• Syntax
• Switch(expression)
• Case value
• statement break
• Case value
• statementbreak
• Case value
• statement break
• Default
• statement break

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Example

• switch (grade)
• case 1 printf("Fall (F)\n")breakcase 2
  printf("Bad (D)\n")breakcase 3 printf("Good
  (C)\n")breakcase 4 printf("Very Good
  (B)\n")breakcase 5 printf("Excellent
  (A)\n")breakdefaultprintf("You have inputted
  false grade\n")break // break isnt necessary
  here

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Decision Making and Looping
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Loops

• Loops are used to repeat a block of code.
• A looping process ,in general, would include yhe
  folloinf four steps
• 1) Setting and initialization of a counter
• 2) Execution of the statement in the loop
• 3) Test for a specified condition for execution
  of the loop
• 4) Incrementing the counter

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Types of Loops

• Java supports three types of loops
• For loop
• While loop
• Do While loop

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For loop

• For Loop
• Syntax for(initializationconditionincreament)
• Example for(i1ilt10i)

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Example

• Class abc
• public static void main(String args)
• int x
• for ( x 0 x lt 10 x )
• System.out.println(x x)

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While Loop

• While Loop Code to execute while the condition
  is true
• Syntax
• While(test condition)
• body of the loop
• Example
• While(igt10)
• System.out.println( I i)
• i

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Example

• -------
• -------
• Sum o
• N1
• While(n lt 10)
• SumSumnn
• nn1
• System.out.println(Sum sum)

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Do while Loop

• Syntax
• do
• while ( condition )
• Example
• Class abc
• public static void main(args)
• int x
• x 0
• do
• System.out.println( "Hello, world!\n" )
• while ( x ! 0 )

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Classes,ObjectsMethods
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Classes

• A class os a userdefind data type with a template
  that serves to define its properties.
• Once the class has been defined,,we have create a
  nuer of objects
• The basic form of a class defition is
• Class classname extends superclassname
• field declaration
• method declaration

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Fields Declaration

• Data is encapsulated in a class by placing data
  fields inside the body of the class defition.
• We can declare the instabce variable exctly the
  same way as we declare local variables
• Example
• class rectangle
• int length
• int width

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Method Declaration

• A class with only data fields has no
  life.
• We must add methods that are necessary
  for manipulating the data contained in
  the class.
• Methods are declared inside the body of
  the class but immediately after the
  declaration of variable.
  

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Continue

• The general form of a method declaration is
• type methodname (parameter-list)
• method-body

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Continue

• Method declaration have four basic parts
• 1)The name of the method (methodname)
• 2)The type of the value the method return(type)
• 3)A list of parameters(paramter-list)
• 4)The body of the method

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Example

• class rectangle
• int length
• int width
• Void getdata(int x, int y) // method
  declaration
• lengthx
• lengthy

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Creating Object

• Object in java are created using the new
  operator.
• The new operator creates an object of the
  specified class and returns a reference to that
  object.
• Example
• Rectangle rect1 //declare the
  object
• rect1 new Rectangle() //instantiate object
• Second way to create a object
• Rectangle rect1new Rectangle()
• Rectangle rect2new Rectangle()
• and so on..

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Accessing Class Member

• Syntax for assigning the value
• objectname.variablenamevalue
• objectname.methodname(parameter-list)
• Example
• rect1.length15
• rect1.width20
• rect2.length22
• rect2.width28

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Example

• Class Rectangle
• int length,width //declaration of variable
• void getData(int x, int y) //defition og methods
• lengthx
• widthy
• int arealengthwidth //definition of
  another method
• return(area)

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Countiue

• rect2.getData(20,12) //accessing methods
• area2rect2.rectArea()
• System.out.println(Area1 area1)
• System.out.println(Area2 area2)

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Thank You

• VaaYaa Edutech provides Java and Advanced
  Training in Ahmedabad.
• A/1/A, 3rd Floor, VaaYaa Lobby, Chinubhai Tower,
  Next to H K College, Ashram Road, Income Tax,
  Gujarat, Ahmedabad- 380009
• Call Us Now 919586979730
• vaayaaedu_at_gmail.com
• Website http//www.vaayaaedu.com/