Java 中实用程序类的命名约定

Java中实用程序类的命名约定

public class StringUtils {
    public static String reverse(String str) {
        return new StringBuilder(str).reverse().toString();
    }
}
public class Main {
    public static void main(String[] args) {
        String input = "Hello, world!";
        String reversed = StringUtils.reverse(input);
        System.out.println(reversed);
    }
}

public class ListUtils {
    public static boolean isEmpty(List list) {
        return list == null || list.isEmpty();
    }
}
public class Main {
    public static void main(String[] args) {
        List list = new ArrayList<>();
        boolean empty = ListUtils.isEmpty(list);
        System.out.println(empty);
    }
}

public class IOUtils {
    public static void close(Closeable closeable) throws IOException {
        if (closeable != null) {
            closeable.close();
        }
    }
}
public class Main {
    public static void main(String[] args) {
        FileInputStream inputStream = null;
        try {
            inputStream = new FileInputStream("file.txt");
            // 读取文件内容
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                IOUtils.close(inputStream);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}