输入一个字符串，判断它有几个字母、几个数字、或其他的字符

public static void main(String[] args) {
	
	int count_abc=0,count_num=0,count_oth=0;
	//输入一串数
	Scanner scan=new Scanner(System.in);
	String str = scan.next();
	char[] chars = str.toCharArray();
	//判断每个字符
	for(int i = 0;i<chars.length;i++){
		if((chars[i]>=65&&chars[i]<=90)||(chars[i]>=97&&chars[i]<=122)){
			count_abc++;
		}else if(chars[i]>=48&&chars[i]<=57){
			count_num++;
		}else{
			count_oth++;
		}
	}
	System.out.println("字母有："+count_abc+"个");
	System.out.println("数字有："+count_num+"个");
	System.out.println("其他的有："+count_oth+"个");
}