java io错误怎么解决

1、两种方法：1.出现异常的

代码

所在的方法前throws IOException public void test() throws IOException {     BufferedReader bu = new BufferedReader(          new InputStreamReader(System.in));     String str = bu.readLine();}2.用try-catch扑捉public void test() {  BufferedReader bu = new BufferedReader(     new InputStreamReader(System.in));  try { String str = bu.readLine();  } catch (IOException e) { e.printStackTrace();  }