String s = "a你bc吃早d餐ef了吗g";
String s1 = s.replaceAll("[^a-zA-Z]", "");
String s2 = s.replaceAll("[a-zA-Z]", "");
System.out.println(s1);
System.out.println(s2);

------解决方案--------------------

String s = "a你bc吃早d餐ef了吗g";
String s1 = s.replaceAll("[^a-zA-Z]", "");
String s2 = s.replaceAll("[a-zA-Z]", "");
System.out.println(s1);
System.out.println(s2);
这个很猛 啊哈哈哈哈