Java Projects

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• Go to Program files–>Apache Software Foundation–>Apache–>root or www .

• Put all files in this folder of you website or project .

• Now you can directly run all these files through browser .

• Just go to your browser and Type : Localhost:8080/Home.html

• And thats it your page will be Loaded instantly .

Follow these steps for running any JSP and HTML projects .

 public class FirstProgram  {  
      public static void main( String [] args )   
   {  
           System.out.print (“Java Program”);  
           System.out.print (“My Program”);  
   }  
  }  

 public class FirstProgram  {  
      public static void main( String [] args )   
   {  
           System.out.print (“Java Program”);  
           System.out.println (“My Program”);  
   }  
  }  

 What are the advantages of Java? 

What is the difference between an interpreter and a compiler?

Define Class and Object?

What are different Java programs.

The public keyword is an access specifier.
Determines how the other parts of the program can access the members of the class.
When a class member is preceded by public, then that member can be access by code outside the class in which it is declared. 

The opposite of public is private.
Prevents a member from being used by code defined outside of its class.

In our program, main() must be declared as public since it must be called by code outside of its class when the program is started.

The keyword static allows main() to be called before an object of the class has been created.
This is necessary since main() is called before an object of the class has been created.

The keyword void tells the compiler that main() does not return a value.
Methods may also return values.

As stated, main() is the method called when a Java application begins.

Any information that you need to pass to a method is received by variables specified within the set of parentheses that follow the name of the method.
These variables are called parameters.
If no parameters are required for a given method, you still need to include the empty parentheses.

The next line
System.out.println (“Java Language”);
Outputs the string “Java Language” followed by  a new line on the screen.

Output is accomplished by the built-in println( ) method.
println( ) displays the string which is passed to it. println( ) can be used to display other types of information as well.

The line begins with System.out.
System is a pre-defined class that provides access to the system out is the output stream that is connected to the console.

System.out is an object that encapsulates console output.
Console input and output is not used frequently in real-world Java programs and applets. Since most application are windowed and graphical in nature, console I/O is used for simple utility programs and demonstration programs.

All statements in Java end with a semicolon.
Notice that the println( ) statement ends with a semicolon.

Java is case sensitive.
If you accidentally type Main instead of main, the program will be incorrect.
Although the Java compiler will compile classes that do not contain a main() method, it has no way to execute them.

 

Small programs designed to add interactivity to Web sites
Downloaded with the Web page and launched by the Internet browser

Run by Web server on the server
Typically generate Web content

Programs that run standalone on a client

Developing a Java Program 

Write the source code

Compile the source code:          javac ClassName.java

Execute the application:         java ClassName

 // FirstProgram.java  
  public class FirstProgram  {  
   public static void main( String [] args )  
   {  
     System.out.println (“Java Program”);  
   }  
  }