1)if-else语句：import java.util.*;public class JudgeChar { public static void main(String[] args) {Scanner input = new Scanner(System.in);System.out.print("输入一个字符：");char c = input.next().charAt(0);if ('a' 'a')&&(c<'z'))system.out.println("it is a word");同理可以写其他...
