题解 | #统计字符#

JAVA

import java.util.* ;

public class Main{
    public static void main(String[] agrs){
        Scanner sc = new Scanner(System.in);
        //Map<String,Integer> charMap = new HashMap<String,Integer>();
        while(sc.hasNext()){
            String inStr = sc.nextLine();
            int engCharCount = 0;
            int spaceCharCount = 0;
            int numCharCount = 0;
            int otherCharCount = 0;
           //遍历输入的字符串
            for(int i =0 ; i<inStr.length();i++){
               //英文字符
                if((inStr.charAt(i) >= 'a' && inStr.charAt(i)<= 'z') || (inStr.charAt(i) >= 'A' && inStr.charAt(i)<= 'Z')){
                    engCharCount ++ ;
                   }else if(inStr.charAt(i) >= '0' && inStr.charAt(i)<= '9'){
                    numCharCount ++;
                }else if(inStr.charAt(i) == ' '){
                    spaceCharCount ++;
                }else{
                    otherCharCount ++;
                }
           }
          System.out.println(engCharCount);
          System.out.println(spaceCharCount);
          System.out.println(numCharCount);
          System.out.println(otherCharCount);
        }
    }
}