rokon12

public class MainThreadDemo {
 public static void main(String[] args) {
  Thread thread = Thread.currentThread();
  System.out.println("Current Thread: " + thread.getName());
 }
}

rokon12

		try (FileInputStream fis = new FileInputStream("file.txt");
		     BufferedInputStream bis = new BufferedInputStream(fis)) {
			// your code belongs to here
			
		} catch (IOException e) {
			e.printStackTrace();
		}

rokon12

import java.io.FileInputStream;
import java.io.IOException;

public class FilePrinter {

	private static void printFileJava7() {

		try (FileInputStream fis = new FileInputStream("file.txt")) {
			int data;
			while ((data = fis.read()) != -1) {

rokon12

import java.io.FileInputStream;
import java.io.IOException;

public class FilePrinter {
	
	private void printFile() {
		FileInputStream fis = null;
		try {
			fis = new FileInputStream("file.txt");
			int data;

rokon12

package java.io;

import java.io.IOException;

public interface Closeable extends AutoCloseable {

    /**
     * Closes this stream and releases any system resources associated
     * with it. If the stream is already closed then invoking this
     * method has no effect.

rokon12

rokonoid@rokonoid:~/multi-threaded-file-copier/src$ javac *.java
rokonoid@rokonoid:~/multi-threaded-file-copier/src$ java CopyApp 
java CopyApp source target-dir
java CopyApp source-dir target-dir
rokonoid@rokonoid:~/multi-threaded-file-copier/src$ java CopyApp /home/rokonoid/Videos/Webcam /home/rokonoid/Videos/copied
copying file from:  /home/rokonoid/Videos/2017-01-07-211505.webm -> to:  /home/rokonoid/Videos/copied/2017-01-07-211505.webm
copying file from:  /home/rokonoid/Videos/2017-01-07-212508.webm -> to:  /home/rokonoid/Videos/copied/2017-01-07-212508.webm
copying file from:  /home/rokonoid/Videos/2017-02-21-213126.webm -> to:  /home/rokonoid/Videos/copied/2017-02-21-213126.webm
copying file from:  /home/rokonoid/Videos/2017-02-21-213210.webm -> to:  /home/rokonoid/Videos/copied/2017-02-21-213210.webm
Copy complete

rokon12

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class CopyApp {

	public void copyFiles(String from, String to) {
		List<File> files = listFile(from);

rokon12

public class CopyThread extends Thread {
	private String from;
	private String to;

	public CopyThread(String from, String to) {
		this.from = from;
		this.to = to;
	}

rokon12

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class Copier {

	public void copy(String from, String to) {
		System.out.println("copying file from:  " + from + " -> to:  " + to);

rokon12

package threads;

public class MyRunnableDemo {
    public static void main(String[] args) {

        MyRunnable myRunnable = new MyRunnable();
        Thread t1 = new Thread(myRunnable);

        t1.start();
    }