try-with-resources使用示例

try (InputStream is = new FileInputStream("test")) {
    is.read();
    ...
} catch(Exception e) {
    ...
} finally {
    //no need to add code to close InputStream, its close method will be internally called
    //（无需添加关闭InputStream输入流的代码，其close()方法会自行调用）
}

转自：https://blog.csdn.net/frgod/article/details/53414813