java正則： 忽略大小寫匹配

import java.util.regex.Matcher; import java.util.regex.Pattern; import com.sun.org.apache.xerces.internal.impl.xpath.regex.CaseInsensitiveMap; public class test { public static void main(String[] args) { String str = "java JavA ABC"; Pattern test_ = Pattern.compile("java",Pattern.CASE_INSENSITIVE); Matcher result_ = test_.matcher(str); str = result_.replaceAll("Perl6"); System.out.println(str); } }