java.util.regex.Pattern.compile(String regex,int flags)
方法將給定的正規表示式編譯為模式。
以下是java.util.regex.Pattern.compile(String regex,int flags)
方法的宣告。
public static Pattern compile(String regex, int flags)
regex
- 要編譯的表示式。flags
- 匹配標誌,一個位掩碼,可能是:CASE_INSENSITIVE
,MULTILINE
,DOTALL
,UNICODE_CASE
,CANON_EQ
,UNIX_LINES
,LITERAL
,UNICODE_CHARACTER_CLASS
和COMMENTS
。IllegalArgumentException
- 如果在flags中設定了與定義的匹配標誌對應的位值以外的位值。PatternSyntaxException
- 如果表示式的語法無效。以下範例顯示了java.util.regex.Pattern.compile(String regex,int flags)
方法的用法。
package com.yiibai;
import java.util.regex.MatchResult;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class PatternDemo {
private static final String REGEX = "(.*)(\\d+)(.*)?# 3 capturing groups";
private static final String INPUT = "This is a sample Text, 1234, with numbers in between.";
public static void main(String[] args) {
// create a pattern
Pattern pattern = Pattern.compile(REGEX,Pattern.COMMENTS);
// get a matcher object
Matcher matcher = pattern.matcher(INPUT);
if(matcher.find()) {
//get the MatchResult Object
MatchResult result = matcher.toMatchResult();
//Prints the offset after the last character matched.
System.out.println("First Capturing Group - Match String end(): "+result.end());
}
}
}
編譯並執行上面的程式,這將產生以下結果 -
First Capturing Group - Match String end(): 53