Java练习，

Java练习，

输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数

import java.util.Scanner;

public class T10 {
    public static void main(String[] args) {
        int digital = 0;
        int character = 0;
        int other = 0;
        int blank = 0;
        char[] ch = null; 
        Scanner in = new Scanner(System.in);
        String str = new String();
        str = in.nextLine();   
        ch = str.toCharArray();
        for (int i = 0; i < ch.length; i++) {
            if(ch[i]>='0'&&ch[i]<='9'){
                digital++;
            }else if((ch[i]>='a'&&ch[i]<='z')||(ch[i]>='A'&&ch[i]<='Z')) {
                character++;
            }else if (ch[i]==' ') {
                blank++;
            }else {
                other++;
            }
        }
        System.out.println("数字："+digital);
        System.out.println("字母："+character);
        System.out.println("空格："+blank);
        System.out.println("其他："+other);
    }
}