技術標籤：Javajava字串

package test3;

import java.util.HashMap;
import java.util.Map.Entry;
import java.util.Scanner;

public class Count {
	public static void simpleCount(String str) {
		int i=0,count1=0,count2=0,count3=0,count4=0;
		while(i<str.length()) {
			if((str.charAt(i)<='Z' && str.charAt(i)>='A') 
					|| str.charAt(i)<='z' && str.charAt(i)>='a') {
				count1++;
			}
			else if(str.charAt(i)>='0' && str.charAt(i)<='9') {
				count2++;
			}
			else if(str.charAt(i)==' ') {
				count3++;
			}
			else {
				count4++;
			}
			i++;
		}
		System.out.println("字母個數：" + count1 + "\n數字個數：" + count2 + "\n空格個數：" + count3 + "\n其它字元個數：" + count4);
	}
	
	public static void detailCount(String str) {
		HashMap<Character,Integer> map = new HashMap<>();
		int i=0;
		while(i<str.length()) {
			if(map.containsKey(str.charAt(i))) {
				map.put(str.charAt(i), map.get(str.charAt(i))+1);
			}
			else {
				map.put(str.charAt(i), 1);
			}
			i++;
		}
		System.out.println("\n詳細統計:");
		for(Entry<Character, Integer> entry:map.entrySet()){
			System.out.println(entry.getKey() + ":\t" + entry.getValue());
		}
	}
	
	public static void main(String args[]) {
		Scanner sc=new Scanner(System.in);
		String str=new String();
		str=sc.nextLine();
		sc.close();
		simpleCount(str);
		detailCount(str);
	}
}