Java-基础 文件操作IO-读取文件内容

public static void main(String[] args)  {
        try {
            BufferedReader in = new BufferedReader(new FileReader("wangaw.txt"));
            String str;
            while ((str = in.readLine()) != null) {
                System.out.println(str);
            }
            System.out.println(str);
        } catch (IOException e) {
        }
    }

读取文件的内容

in.readLine()整行的读取，当读到为空的时候停止