Program to find the greater number from the three nos. using nested if else statement

Classs max

{

             Public static void main (String args[]) 

             {

Int a,b,c;

A=25; b=30; c=10;

if(a>b)

             {

if(a<c)

System.out.println(“a is maximum”);

else

System.out.println(“c is maximum”);

}

else

if(b>c)

System.out.printl(“b is maximum”);

else

System.out.printl(“c is maximum”);

}

               }

}

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A simple program for addition of two values:

Class addition

{

Public static void main (String args[])

   {

int a = 5, b=10;

int c= a+ b;

System.out.println(“the sum of two value is :” +c);

    }

}

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The Java Runtime Environment

The Java Runtime Environment (JRE) consists of the JVM and the program on the other. The Java Runtime Environment runs code compiled for the JVM by:

Loading the .class files

Verifying byte code

Executing the code

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Just in Time Compilers (JIT)

-The Java Virtual Machine includes an optional ‘just-in time’ (JIT) compiler.

-The JIT:

       -Dynamically compilers byte code into executable code

       -Takes byte codes and compilers them into native code for the machine

       -Compiles programs on a methods by method basis just before they are called

       -Is faster than the Java Virtual Machine

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Process of compilation

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Java virtual Machine

• All language compilers translate source code into machine code for a specific computer.
• Java compiler produces an intermediate code known as byte-code for a machine.
• This machine is called Java Virtual Machine (JVM ) and it exists only inside the computer’s memory.
• It is simulator of computer wihin the computer and does all major functions of a real computer.                                                                                                                                                                    

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Process of building and running java application programs

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