输入一行字符串分别统计出字母。数字。空格和其他字符 *利用while循环语句条件输入的字符为"\n"

package zy;

import java.util.Scanner;

import java.util.regex.Pattern;

/**

* 输入一行字符串分别统计出字母。数字。空格和其他字符

* 利用while循环语句条件输入的字符为”\n”

* @author Administrator

*

*/

public class Test3 {

public static void main(String[] args) {

System.out.println(“请输入一串字符：”);

Pattern m = Pattern.compile(“\d”);

Pattern z = Pattern.compile(“[a-zA-Z]”);

Pattern k = Pattern.compile(“\s”);

Scanner sc = new Scanner(System.in);

String msg=sc.next();

int sz=0,zm=0,kg=0,o=0;

char[] cs = msg.toCharArray();

for (char c : cs) {

String s = String.valueOf(c);

//判断s是否满足正则表达式

if (m.matcher(s).matches()) {

sz++;

}else if (z.matcher(s).matches()) {

zm++;

}else if (k.matcher(s).matches()) {

kg++;

}else {

o++;

}

}

System.out.println(“字母有”+zm+”个”);

System.out.println(“数字有”+sz+”个”);

System.out.println(“空格有”+kg+”个”);

System.out.println(“其他字符有”+o+”个”);

sc.close();

}

}