Click here to watch in Youtube :
https://www.youtube.com/watch?v=a-C5m0ssBG4&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge

Java Tutorial : Java IO (what is java IO?)

Java Tutorial : Java IO (what is java IO?)

JavaIODemo1.java

public class JavaIODemo1
{

    public static void main(String[] args)
    {
        System.out.println("Hello...\n");
        System.err.println("Error...");
    }

}

Hello...
Error...

import java.io.IOException;

public class JavaIODemo2
{

    public static void main(String[] args)
    {
        try
        {
            System.out.print("Enter the Value = ");
            // returns ASCII code of 1st character
            int intValue = System.in.read();
            System.out.println("intValue = " + intValue);
            System.out.println((char) intValue);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }

}