package com.com.com;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class IoStream {
    public static InputStreamReader in = new InputStreamReader(System.in);
    public static BufferedReader br = new BufferedReader(in);

    /**
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        String str = br.readLine();
        System.out.println(str);
    }
}

------解决方案--------------------

public static InputStreamReader in = new InputStreamReader(System.in）； //这个分号不对

另外， br.readLine(); 可能会抛出异常，要做异常捕捉处理或者继续往上抛出异常，所以，可以修改为
Java code
try {
    String str = br.readLine(); 
    System.out.println(str);
} catch (Exception e) {
    e.printStackTrace();
}

------解决方案--------------------

Java code

public static InputStreamReader in = new InputStreamReader(System.in);
    public static BufferedReader br = new BufferedReader(in);

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println(str);
    }