• command prompt arguments (argu in main(String[] argu))
• System.in
• TextComponent.getText()
• JOptionPane
• Listeners

• System.out; System.err
• TextComponent, Graphics
• Sound and Video

• File -> record -> data -> bit
• stored on secondary storage devices
• Sequential and random access

private static BufferedReader  stdIn = new
 BufferedReader(new  InputStreamReader(System.in));
private static PrintWriter  stdOut = new
 PrintWriter(System.out, true);
private static PrintWriter  stdErr = new
 PrintWriter(System.err, true);

import java.io.*;

public class HelloYourName {
 public static void main(String[] arg) 
                             throws IOException {
  String yourName;
  System.out.print("Enter your name : " );
  yourName =  
   (new BufferedReader(new InputStreamReader(System.in))).readLine();
  System.out.println("Hello " + yourName);
 }
}

import java.io.*;

public class HelloYourName1 {
 public static void main(String[] arg) 
                             throws IOException {
  String yourName;
  BufferedReader  stdIn = new  BufferedReader(new InputStreamReader(System.in));

  System.out.print("Enter your name : " );
  yourName =  stdIn.readLine();
  System.out.println("Hello " + yourName);
 }
}
	

import java.io.*;

public class HelloYourName2 {

    private static BufferedReader  stdIn =
          new  BufferedReader(new InputStreamReader(System.in));

    public static void main(String[] arg) throws IOException {

           String yourName;

           System.out.print("Enter your name : " );
           yourName =  stdIn.readLine();
           System.out.println("Hello " + yourName);
    }
}
       

import java.io.*;

public class HelloYourName3 {

    private static BufferedReader  stdIn =
          new  BufferedReader(new InputStreamReader(System.in));

    public static void main(String[] arg) {

        String yourName="";

        System.out.print("Enter your name : " );

	   try {
	           yourName =  stdIn.readLine();
	   } catch (IOException ioe) {}

        System.out.println("Hello " + yourName);
    }
}