1 package demo;
2 import java.util.Scanner;
3 /**
4 * 统计一个字符串中英文字母、空格、数字和其它字符的个数
5 */
6 public class Statistics1 {
7 public static void main(String[]args){
8 int i;
9 int LetterCount = 0;
10 int SpaceCount = 0;
11 int NumberCount = 0;
12 int OtherCount = 0;
13
14 //输入一个字符串
15 Scanner in = new Scanner(System.in);
16 System.out.println("请输入一个字符串:");
17 String str = in.nextLine();
18
19 //字符串转换成字符数组
20 char[]ch = str.toCharArray();
21 for(i = 0; i<str.length();i++){
22 if(Character.isLetter(ch[i])){
23 LetterCount++;
24 }else if(Character.isSpaceChar(ch[i])){
25 SpaceCount++;
26 }else if(Character.isDigit(ch[i])){
27 NumberCount++;
28 }
29 else{
30 OtherCount++;
31 }
32 }
33
34 System.out.println("字符的个数为:"+LetterCount);
35 System.out.println("空格的个数为:"+SpaceCount);
36 System.out.println("数字的个数为:"+NumberCount);
37 System.out.println("其他字符个数为:"+OtherCount);
38 }
39 }
