java考点之程序看iO流操作

如题：2021年4月 第30题

public class Test30_2104 {
   
    public static void main(String[] args) throws IOException {
   
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        String str = br.readLine();
        int i, ditNo = 0, upCharNo = 0, IoCharNo = 0, otherCharNo = 0;
        for (i = 0 ; i < str.length(); i++) {
   
            if (str.charAt(i) <= '9' && str.charAt(i) >= '0') {
   
                ditNo++;
            } else if (str.charAt(i) <= 'Z' && str.charAt(i) >= 'A') {
   
                upCharNo++;
            } else if (str.charAt(i) <= 'z' && str.charAt(i) >= 'a') {
   
                IoCharNo++;
            } else otherCharNo++;
        } System.out.println("N1=" + ditNo + "\t" + 
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