📜  Java中的 MatchResult end(int) 方法和示例

📅  最后修改于: 2022-05-13 01:55:08.561000             🧑  作者: Mango

Java中的 MatchResult end(int) 方法和示例

MatchResult 接口end(int group)方法用于从指定组中获取已经完成的匹配结果的结束索引之后的偏移量。

句法:

public int end(int group)

参数:此方法采用一个参数,从该参数组中需要匹配模式的结束索引之后的偏移量。

返回值:该方法返回从指定组匹配的结束索引之后的偏移量

异常:此方法抛出:

  • 如果尚未尝试匹配,或者之前的匹配操作失败,则IllegalStateException
  • 如果给定组的模式中没有捕获组,则IndexOutOfBoundsException

以下示例说明了 MatchResult.end() 方法:

示例 1:

// Java code to illustrate end() method
  
import java.util.regex.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the regex to be checked
        String regex = "(G*s)";
  
        // Create a pattern from regex
        Pattern pattern
            = Pattern.compile(regex);
  
        // Get the String to be matched
        String stringToBeMatched
            = "GeeksForGeeks";
  
        // Create a matcher for the input String
        MatchResult matcher
            = pattern
                  .matcher(stringToBeMatched);
  
        while (((Matcher)matcher).find()) {
            // Get the last index of match result
            System.out.println(matcher.end(1));
        }
    }
}
输出:
5
13

示例 2:

// Java code to illustrate end() method
  
import java.util.regex.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the regex to be checked
        String regex = "(G*G)";
  
        // Create a pattern from regex
        Pattern pattern
            = Pattern.compile(regex);
  
        // Get the String to be matched
        String stringToBeMatched
            = "GFG FGF GFG";
  
        // Create a matcher for the input String
        MatchResult matcher
            = pattern
                  .matcher(stringToBeMatched);
  
        while (((Matcher)matcher).find()) {
            // Get the last index of match result
            System.out.println(matcher.end(0));
        }
    }
}
输出:
1
3
6
9
11