JAva IOストリームバイトストリーム大文字書き込み

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
	public static void writeFile(File file, File newfile) throws FileNotFoundException {
		BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(newfile, true));
		BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(file));
		byte byte1[] = new byte[(byte) file.length()];
		int len = 0;
		try {
			while ((len = bufferedInputStream.read(byte1)) != -1) {
				for (int i = 0; i < byte1.length; i++) {
					char a = (char) (byte1[i] + 'A' - 'a');
					bufferedOutputStream.write(a);

				}
				bufferedOutputStream.close();
				bufferedInputStream.close();
			}
		} catch (IOException e) {

		}

	}

	public static void main(String[] args) {
		File file = new File("D:\\666\\444.txt");
		File newfile = new File("D:\\666\\555.txt");
		try {
			writeFile(file, newfile);
			System.out.println("successful!");
		} catch (FileNotFoundException e) {
			System.out.println("nono!");
		}
	}

}