public class Demo2_Regex {
/** * [abc] a、b 或 c（简单类） [^abc] 任何字符，除了 a、b 或 c（否定） [a-zA-Z] a 到 z 或 A 到 Z，两头的字母包括在内（范围） [a-d[m-p]] a 到 d 或 m 到 p：[a-dm-p]（并集） [a-z&&[def]] d、e 或 f（交集） [a-z&&[^bc]] a 到 z，除了 b 和 c：[ad-z]（减去） [a-z&&[^m-p]] a 到 z，而非 m 到 p：[a-lq-z]（减去） */public static void main(String[] args) { //demo1(); //demo2(); //demo3(); //demo4(); //demo5(); //demo6(); String regex = "[a-z&&[^m-p]]"; System.out.println("m".matches(regex)); System.out.println("a".matches(regex)); System.out.println("z".matches(regex)); System.out.println("n".matches(regex));}private static void demo6() { String regex = "[a-z&&[^bc]]"; System.out.println("a".matches(regex)); System.out.println("b".matches(regex)); System.out.println("1".matches(regex));}private static void demo5() { String regex = "[a-z&&[def]]"; //取交集 System.out.println("a".matches(regex)); System.out.println("d".matches(regex));}private static void demo4() { String regex = "[a-d[m-p]]"; System.out.println("a".matches(regex)); System.out.println("m".matches(regex)); System.out.println("n".matches(regex));}private static void demo3() { String regex = "[a-zA-Z]"; System.out.println("a".matches(regex)); System.out.println("A".matches(regex)); System.out.println("z".matches(regex)); System.out.println("Z".matches(regex)); System.out.println("1".matches(regex)); System.out.println("%".matches(regex));}private static void demo2() { String regex = "[^abc]"; System.out.println("a".matches(regex)); System.out.println("b".matches(regex)); System.out.println("c".matches(regex)); System.out.println("d".matches(regex)); System.out.println("1".matches(regex)); System.out.println("%".matches(regex)); System.out.println("10".matches(regex)); //10代表1字符和0字符,不是单个字符}private static void demo1() { String regex = "[abc]"; //[]代表单个字符 System.out.println("a".matches(regex)); System.out.println("b".matches(regex)); System.out.println("c".matches(regex)); System.out.println("d".matches(regex)); System.out.println("1".matches(regex)); System.out.println("%".matches(regex));}}
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