Java method Exception throw with return instance.

最新推荐文章于 2022-12-20 10:09:41 发布

原创最新推荐文章于 2022-12-20 10:09:41 发布 · 358 阅读

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本文详细介绍了如何修改静态环境库，以防止在初始化过程中抛出异常，并提供了实例代码来说明实现方法。

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Work by Jianfei is licensed under a Creative Commons wei 3.0 Unported License.

1. We will get an error if write the getInstance method like below, cause the StaticEnvLib() throw a exception but there is no try- catch to catch it during the return new method.

    public static StaticEnvLib getInstance()
     {
          return new StaticEnvLib();
     }

public StaticEnvLib() throws IOException {

        String filename = " H:\\Darwin.ini " ;
        BufferedReader reader = new BufferedReader( new InputStreamReader(
                 new FileInputStream(filename), " UTF-8 " ));
        read(reader);
        reader.close();
    }

2. Modify the StaticEnvLib to like below.

public StaticEnvLib() {

        String filename = "H:\\Darwin.ini";
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                new FileInputStream(filename), "UTF-8"));
        read(reader);
        reader.close();
    }