异常处理中"finally"子句的好处

该finally是非常在其中一些资源需要被释放的情况下非常有用.

例如:

InputStream is = null;
try {
    is = new FileInputStream("C://test.txt");
    //some reading-file logic 
} catch (Exception e) {
    //exception handling
} finally {
    //releasing the resources (closing the input stream)
    if (is != null) {
        is.close();
    }
}