java 相對路徑

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

public class HelloWord {

public static void main(String[] args) {
HelloWord h = new HelloWord();
h.copyFileToFile();
}

public void copyFileToFile(){
String path = HelloWord.class.getResource("a.txt").getFile();   
File f1 = new File(path);
System.out.println(path);
File f2 = new File("/home/kitten/b.txt");

try {
FileInputStream fis = new FileInputStream(f1);
byte[] b = new byte[1024];

fis.read(b);
String s=new String(b);
System.out.println(s);
FileOutputStream fos = new FileOutputStream(f2);
fos.write(b);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}