java.time.MatchResult.group()方法返回与上一个匹配项匹配的输入子序列。
String group() - 声明
String group()
String group() - 返回值
与上一个匹配项匹配的(可能为空)子序列,为字符串形式。
String group() - 异常
IllegalStateException -如果尚未尝试匹配,或者上一个匹配操作失败。
String group() - 示例
下面的示例显示java.time.MatchResult.group()方法的用法。
package com.learnfk; import java.util.regex.MatchResult; import java.util.regex.Matcher; import java.util.regex.Pattern; public class MatchResultDemo { private static final String REGEX = "(.*)(\\d+)(.*)"; 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); //get a matcher object Matcher matcher = pattern.matcher(INPUT); if(matcher.find()) { //get the MatchResult MatchResult result = matcher.toMatchResult(); //Prints the input subsequence matched by the previous match. System.out.println("First Capturing Group - Match String: "+result.group()); } } }
让无涯教程编译并运行以上程序,这将产生以下输出-
First Capturing Group - Match String: This is a sample Text, 1234, with numbers in between.
参考链接
https://www.learnfk.com/javaregex/javaregex-matchresult-group.html