假设我有一个将字母转换为数字的程序,这样:
输入:abcd
输出:1234
- 如何有效地将 abcd 转换为 1234
- 以及如何从令牌中提取每个单独的字符
顺便说一句,这不是家庭作业。(这是为了好玩)
这是我到目前为止所拥有的:
public class Test {
public static void main(String[] args) throws IOException {
BufferedReader f = new BufferedReader(new FileReader("test.in"));
PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("test.out.txt")));
StringTokenizer st = new StringTokenizer(f.readLine());
int i1 = Integer.parseInt(st.nextToken());
// How can I convert this into integers? (where a = 1, b = 2, and c = 3)
out.println(????);
out.close();
System.exit(0);
}
}