039-Java-030

matches 和 lookingAt 方法 matches 和 lookingAt 方法都用来尝试匹配一个输入序列模式。它们的不同是 matcher 要求整个序列都匹配，而lookingAt 不要求。

lookingAt 方法虽然不需要整句都匹配，但是需要从第一个字符开始匹配。

import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexMatches { private static final String REGEX = "foo"; private static final String INPUT = "fooooooooooooooooo"; private static final String INPUT2 = "ooooofoooooooooooo"; private static Pattern pattern; private static Matcher matcher; private static Matcher matcher2; public static void main( String args[] ){ pattern = Pattern.compile(REGEX); matcher = pattern.matcher(INPUT); matcher2 = pattern.matcher(INPUT2); System.out.println("Current REGEX is: "+REGEX); System.out.println("Current INPUT is: "+INPUT); System.out.println("Current INPUT2 is: "+INPUT2); System.out.println("lookingAt(): "+matcher.lookingAt()); System.out.println("matches(): "+matcher.matches()); System.out.println("lookingAt(): "+matcher2.lookingAt()); } }