3、键盘录入一个字符串，统计该字符串中的大写字母、小写字母、数字字符和其他字符分别有多少个 例如，键盘录入abcABCD12345!@#$%&，输出结果为：小写字母有3个，大写字母有4个，数字字符有5

import java.util.Scanner;

class Homework06{

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("请输入字符串:");

String str = sc.nextLine();

//toCharArray()方法将字符串转换为字符数组

char[] chs = str.toCharArray();

int bigNum = 0;

int smallNum = 0;

int numberNum = 0;

int otherNum = 0;

for(int i=0;i

if(chs[i]>='A'&&chs[i]<='Z'){

bigNum++;

}else if(chs[i]>='a'&&chs[i]<='z'){

smallNum++;

}else if(chs[i]>='0'&&chs[i]<='9'){

numberNum++;

}else{

otherNum++;

}

}

System.out.println("大写字母个数:"+bigNum+",小写字母个数:"+smallNum+",数字个数:"+numberNum+",其他字符个数:"+otherNum);

}

}