Java Matcher hitEnd()用法及代码示例

Matcher类的hitEnd()方法用于检查此匹配器上的模式匹配是否已停止。当在匹配器中找不到更多匹配的组时，匹配结束。此方法返回一个声明相同的布尔值。

用法:

public boolean hitEnd()

参数：此方法不带参数。

返回值：此方法返回一个布尔值，说明此匹配器是否已完成匹配。

下面的示例说明Matcher.hitEnd()方法：

示例1:

// Java code to illustrate hitEnd() method 
  
import java.util.regex.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Get the regex to be checked 
        String regex = "(Geeks)"; 
  
        // Create a pattern from regex 
        Pattern pattern 
            = Pattern.compile(regex); 
  
        // Get the String to be matched 
        String stringToBeMatched 
            = "GeeksForGeeks Geeks for For Geeks Geek"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern.matcher(stringToBeMatched); 
  
        while (matcher.find()) { 
  
            System.out.println("Group matched: "
                               + matcher.group()); 
  
            // Check if the matching has ended 
            // using hitEnd() method 
            System.out.println("Has matching hit end: "
                               + matcher.hitEnd()); 
        } 
  
        // Check if the matching has ended 
        // using hitEnd() method 
        System.out.println("Has matching hit end: "
                           + matcher.hitEnd()); 
    } 
}

输出：

Group matched: Geeks
Has matching hit end: false
Group matched: Geeks
Has matching hit end: false
Group matched: Geeks
Has matching hit end: false
Group matched: Geeks
Has matching hit end: false
Has matching hit end: true

示例2:

// Java code to illustrate hitEnd() method 
  
import java.util.regex.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Get the regex to be checked 
        String regex = "(GFG)"; 
  
        // Create a pattern from regex 
        Pattern pattern 
            = Pattern.compile(regex); 
  
        // Get the String to be matched 
        String stringToBeMatched 
            = "GFGFGFGFGFGFGFGFGFG FGF GFG GFG FGF"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern.matcher(stringToBeMatched); 
  
        while (matcher.find()) { 
  
            System.out.println("Group matched: "
                               + matcher.group()); 
  
            // Check if the matching has ended 
            // using hitEnd() method 
            System.out.println("Has matching hit end: "
                               + matcher.hitEnd()); 
        } 
  
        // Check if the matching has ended 
        // using hitEnd() method 
        System.out.println("Has matching hit end: "
                           + matcher.hitEnd()); 
    } 
}

输出：

Group matched: GFG
Has matching hit end: false
Group matched: GFG
Has matching hit end: false
Group matched: GFG
Has matching hit end: false
Group matched: GFG
Has matching hit end: false
Group matched: GFG
Has matching hit end: false
Group matched: GFG
Has matching hit end: false
Group matched: GFG
Has matching hit end: false
Has matching hit end: true

参考： https://docs.oracle.com/javase/9/docs/api/java/util/regex/Matcher.html#hitEnd–

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注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 Matcher hitEnd() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。