Question

我怎样才能用java编写程序，用＃34; a＆＃34;你可以写下字母或数字：一个 AA A123 aa432a

调节器exp为此信（letter | num）*

感谢名单。

Answer 1

正如你要求的那样，正则表达式将是[a]([a]|[1-9])*。

Answer 2

也许这对你有所帮助，现在给你了：

public class Main {

    public static void main(String[] args) 
    {
        //http://www.mkyong.com/java/how-to-read-input-from-console-java/
        System.out.println("Enter something here : ");

        try{
            BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));
            String input = bufferRead.readLine();

            boolean match = input.matches("[a]([a]|[1-9])*"); // maybe [a]([a-z]|[1-9])*

            System.out.println("Does it match? "+match);
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }
    }
}

我怎样才能在java中编写代码以字母开头

2 个答案: