统计字符Java

解题思路:

注意事项:

参考代码:

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

Scanner scanner=new Scanner(System.in);

String str=scanner.nextLine();

int count1=0,count2=0,count3=0,count4=0;

for(int i=0;i<str.length();i++) {

if(str.charAt(i)>='a' && str.charAt(i)<='z' || (str.charAt(i)>='A' && str.charAt(i)<='Z'))

count1++;

else if(str.charAt(i)==' ')

count2++;

else if(str.charAt(i)>='0' && str.charAt(i)<='9')

count3++;

else 

count4++;

}

System.out.println(count1);

System.out.println(count2);

System.out.println(count3);

System.out.println(count4);

}

}