题解 | #判断各类型字符个数#

public class Main {
    public static void main(String[] args) {
        int numbers = 0;
        int words = 0;
        int space = 0;
        int other = 0;
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        int i;
        char ch;
        
        for(i=0;i<=str.length()-1;i++){
            ch=str.charAt(i);
            if(ch>='0'&&ch<='9'){
                numbers+=1;
            }
            else if(ch>='a'&&ch<='z'||ch>='A'&&ch<='Z'){
                words+=1;
            }
            else if(ch==' '){
                space+=1;
            }
            else{
                other+=1;
            }
        }
        //write your code here......
        System.out.println("英文字母"+words+"数字"+numbers+"空格"+space+"其他"+other);
    }
}