Files in Java

Files in Java Programming
Section One

Reading data from InputStream using commandLines

1. Command-Line Arguments
Any Java technology application can use command-line arguments.
• These string arguments are placed on the command line to launch the Java interpreter after the class name:
public class TestArgs {
public static void main (String [] args){
for (int i=0; i< args.length; i++)
System.out.println("args ["+i+"]is :" +args[i]);
}
}

• Each command-line argument is placed in the args array that is passed to the static main method as below :

public class CallTest {
public static void main(String[] args) {
String args1[]={"seeyou","ali","mohammed"};
TestArgs xx= new TestArgs();
xx.main(args1);
}}
2. I/O Stream Fundamentals
A stream is a flow of data from a source or to a sink
A source stream initiates the flow of data, also called an input stream.
A sink stream terminates the flow of data, also called an output stream.
Sources and sinks are also called Input streams and output streams
Types of node streams are files, memory, and pipes between threads or processes.


For example to read from console, we use the read() method as
below:-