Matcher类的hasAnchoringBounds()方法用于检查此Matcher是否具有锚定边界。通过锚定边界,这意味着如果锚定边界设置为true,则匹配器将匹配^和$之类的锚以获取匹配项。此方法返回一个声明相同的布尔值。
用法:
public boolean hasAnchoringBounds()
参数:此方法不带参数。
返回值:此方法返回一个布尔值,说明此匹配器是否具有锚定边界
下面的示例说明Matcher.hasAnchoringBounds()方法:
示例1:
// Java code to illustrate hasAnchoringBounds() 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);
// Check if this matcher has anchoring bounds or not
// using hasAnchoringBounds() method
System.out.println("Does this matcher"
+ " has anchoring bounds: "
+ matcher.hasAnchoringBounds());
}
}
输出:
Does this matcher has anchoring bounds: true
示例2:
// Java code to illustrate hasAnchoringBounds() method
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
// Get the regex to be checked
String regex = "(F*F)";
// Create a pattern from regex
Pattern pattern = Pattern.compile(regex);
// Get the String to be matched
String stringToBeMatched
= " FGF GFG GFG FGF";
// Create a matcher for the input String
Matcher matcher
= pattern.matcher(stringToBeMatched);
// set the anchoring bounds to true
matcher = matcher
.useAnchoringBounds(false);
// Check if this matcher has anchoring bounds or not
// using hasAnchoringBounds() method
System.out.println("Does this matcher"
+ " has anchoring bounds: "
+ matcher.hasAnchoringBounds());
}
}
输出:
Does this matcher has anchoring bounds: false
参考: https://docs.oracle.com/javase/9/docs/api/java/util/regex/Matcher.html#hasAnchoringBounds–
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