type in java

Types and Values
There are two kinds of types in the Java programming language:
1)primitive types
2)reference types

• There are, correspondingly, two kinds of data values that can be stored in variables, passed as arguments, returned by methods,
• There is also a special null type, the type of the expression null, which has no name.
• Because the null type has no name, it is impossible to declare a variable of the null type or to cast to the null type.
• The null reference is the only possible value of an expression of null type.
• The null reference can always be cast to any reference type.

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object in java

What Is an Object?

Objects are key to understanding object-oriented technology.

Look around right now and you'll find many examples of real-world objects: your dog, your desk, your television set, your bicycle.

Real-world objects share two characteristics:
 They all have state and behavior. Dogs have state (name, color, breed, hungry) and behavior (barking, fetching, wagging tail). Bicycles also have state (current gear, current pedal cadence, current speed) and behavior (changing gear, changing pedal cadence, applying brakes). Identifying the state and behavior for real-world objects is a great way to begin thinking in terms of object-oriented programming.

Example: 

A dog has states-color, name, breed as well as behaviors -wagging, barking, eating. An object is an instance of a class.

Syntax


class name objectname=new classname();

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java environment setup windows

Java Environment Setup:
Java SE is freely available from the link Download Java. So you download a version based on your operating system.
You can refere to installation guide for a complete detail.


Click Start > Control Panel > System icon to open System Properties dialog box.

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what is java

Java is:
• Object Oriented
• Platform independent:
• Simple
• Secure
• Architectural- neutral
• Portable
• Robust
• Multi-threaded
• Interpreted
• High Performance
• Distributed
• Dynamic

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nested if else statement in c

Nested if else statement
syntax
If(test condition1)

{

If(test condition2);

{

Statement1;

}

Else

{

Statement2

}

Else

{

Statement 3

}

Statement –x



If the test expression can be executed first if it is true then true block can be executed immediately

following if statement are executed otherwise false statement are executed

if neither case they statement x can be executed

Eg:

If(sex is female)

{

If(bal<500O)

Bonus=.05*bal;

Else

Bonus=.02*bal;

Bal=bal+bonus;

Program:

Main()

{

Int a,b,c;

Printf(“enter the value”);

Scanf(“%d%d%d”,&a,&b,&c);

If(a>b)

{

If(a>c)

Printf(“%d”,a);

Else

Printf(“%d”,c);

}

Else

{

If(c>b)

Printf(“%d”,c);

Else

Printf(“%d”,b);

}

}

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