第1个回答 推荐于2017-09-01
你是要这样?
String[] letter = new String[]{"A","B","C","D","E","F"};
Scanner sc = new Scanner(System.in);
//首先定义好规则,存放在MAP中、
Map<String, Object> map = new LinkedHashMap<String, Object>();
for (int i = 0; i < letter.length; i++) {
map.put(letter[i], letter[letter.length-1-i]);
}
System.out.println("请输入一个字母:");
String str = sc.next().toUpperCase();
if(map.get(str)==null){
System.out.println("没有结果!");
}else{
System.out.println("结果:"+map.get(str));
}本回答被提问者和网友采纳