使用的正则表达式

package Test_1;

import java.util.Scanner;

public class Test_7 {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

System.out.print("请输入数字、字母、汉字或其他字符：");

Scanner input = new Scanner(System.in);

String str = input.next();

String E1 = "[\u4e00-\u9fa5]"; //匹配汉字

String E2 = "[a-zA-Z]"; //匹配英文字符

String E3 = "[1-9]"; //匹配数字

int countH = 0;

int countE = 0;

int countD = 0;

int countO = 0;

char[] arrChar = str.toCharArray();

String[] arrStr = new String[arrChar.length];

for(int i=0;i

arrStr[i] = String.valueOf(arrChar[i]);

}

for(String i: arrStr){

if(i.matches(E1))

countH++;

else if(i.matches(E2))

countE++;

else if(i.matches(E3))

countD++;

}

System.out.println("汉字的个数"+countH);

System.out.println("英文的个数"+countE);

System.out.println("数字的个数"+countD);

}

}