Java后端，正则匹配

public static void main(String[] args) {

/*String a = "12fga$";

String b = "2g";

((b));

//字符串长度

(());

//英文字母正则

String regex1 = ".*[a-zA-z].*";

//是否含有英文

boolean result3 = (regex1);

(result3);

//是否含有数字

String regex2 = ".*[0-9].*";

boolean result4 = (regex2);

(result4);

//是否含有特殊字符

String regEx = "[ _`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]|\n|\r|\t";

Pattern p = (regEx);

boolean m = (a).find();

(m);

//仅仅包含字母和数字

String regX3 = "^[a-z0-9A-Z]+$";

//包含字母和数字

String regX4 = ".*[a-z0-9A-Z].*";

Boolean result5 = (regX3);

(result5);*/

String acc = ();

(acc);

/*String str =().toString().replace("-", "");

(str);*/

}