//: FC.java//任何内容都可合并,不限文本文件import java.io.*;public class FC { //将f1,f2,中的内容合并写入f3中 static void test(String f1,String f2,String f3)throws Exception{byte[] buffer = new byte[1024*8];int read;BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(f3));BufferedInputStream bin = new B...