Example of FileInput/OutputStream to copy a file

copyFile.java

import java.io.*;

public class copyFile {

	public static void main(String[] args) {
		copyFile(args[0], args[1]);
	}

	public static void copyFile(String file, String target) {
		try {
			byte[] buffer = new byte[1024];
			InputStream source = new FileInputStream(file);
			int byteSize = source.read(buffer);
			OutputStream destination = new FileOutputStream(target);

			while (byteSize != -1) {
				destination.write(buffer);
				byteSize = source.read(buffer);
			}
		} catch (IOException e) {
			System.out.println("There was an issue copying the file. Check file names");
		}
	}

}