题目:输入一段字符,包含大写字母或者小写字母,输出对应的大写或者小写转换,数字不管
代码实现:
import java.util.Scanner;public class ZimuChange {public static void main(String[] args) {System.out.println("请输入任意字符:");Scanner sc = new Scanner(System.in);String s = sc.next();//定义一个StringBuffer的实例sbStringBuffer sb = new StringBuffer();if (s != null) {for (int i = 0; i < s.length(); i++) {//索引指定位置的字符char c = s.charAt(i);//判断是否为小写字母if (Character.isLowerCase(c)) {sb.append(Character.toUpperCase(c));} else if (Character.isUpperCase(c)) {sb.append(Character.toLowerCase(c));}}}//打印输出System.out.println("转换后的字符:" + sb);}}
输出结果: