我是Java中的多线程和同步的新手。我正在尝试实现一项任务，其中给了我5个文件，每个文件将由一个特定线程读取。每个线程应从文件读取一行，然后将执行转发到下一个线程，依此类推。当所有5个线程都读取第一行时，然后再次从线程1运行行号开始。文件1中的2，依此类推。

Thread ReadThread1 = new Thread(new ReadFile(0));

Thread ReadThread2 = new Thread(new ReadFile(1));

Thread ReadThread3 = new Thread(new ReadFile(2));

Thread ReadThread4 = new Thread(new ReadFile(3));

Thread ReadThread5 = new Thread(new ReadFile(4));

// starting all the threads

ReadThread1.start();

ReadThread2.start();

ReadThread3.start();

ReadThread4.start();

ReadThread5.start();

并且在ReadFile(在run方法中实现Runnable的情况下，我正在尝试在bufferreader对象上进行同步。

BufferedReader br = null;

String sCurrentLine;

String filename="Source/"+files[fileno];

br = new BufferedReader(new FileReader(filename));

synchronized(br)

{

while ((sCurrentLine = br.readLine()) != null) {

int f=fileno+1;

System.out.print("File No."+f);

System.out.println("-->"+sCurrentLine);

br.notifyAll();

// some thing needs to be dine here i guess

}}

需要帮忙