java Java 中 Matcher hitEnd()方法，带示例

Java 中 Matcher hitEnd()方法，带示例

原文:https://www . geesforgeks . org/matcher-hitend-method-in-Java-with-examples/

匹配器类的 hitEnd() 方法用于检查该匹配器上的图案匹配是否已经停止。当在匹配器中没有找到更多匹配的组时，匹配结束。此方法返回一个表示相同内容的布尔值。

语法:

public boolean hitEnd()

参数:该方法不取参数。

返回值:该方法返回一个布尔值，表示该匹配器是否完成匹配。

以下示例说明了 Matcher.hitEnd()方法:

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

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