buffer.java

package Stream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class FileDemo {

	public static void main(String[] args) throws IOException {
		File file = new File("test.txt");
		copyFile(file);
		
	}
	
	
	public static void copyFile(File f) throws IOException {
		
		File newFile = new File("test_copy.txt");
		
		    InputStream input = null;
		    OutputStream output = null;
		    try {
		        input = new FileInputStream(f);

		        output = new FileOutputStream(newFile);

		        byte[] buf = new byte[256];
		        int bytesRead;
		        while ((bytesRead = input.read(buf)) > 0) {
		            output.write(buf, 0, bytesRead);
		        }
		    } finally {
		        input.close();
		        output.close();
		    }
		}


	
	

}