java正則學習筆記
阿新 • • 發佈:2018-06-28
pri print ati 學習 private println 單個 包括 [] public class Demo2_Regex {
/** * [abc] a、b 或 c(簡單類) [^abc] 任何字符,除了 a、b 或 c(否定) [a-zA-Z] a 到 z 或 A 到 Z,兩頭的字母包括在內(範圍) [a-d[m-p]] a 到 d 或 m 到 p:[a-dm-p](並集) [a-z&&[def]] d、e 或 f(交集) [a-z&&[^bc]] a 到 z,除了 b 和 c:[ad-z](減去) [a-z&&[^m-p]] a 到 z,而非 m 到 p:[a-lq-z](減去) */ 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,不是單個字符 } private static void demo1() { String regex = "[abc]"; //[]代表單個字符 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)); }
}
java正則學習筆記