Java中的 Matcher useTransparentBounds(boolean) 方法及示例
Matcher 类的useTransparentBounds(boolean)方法用于设置此匹配器的透明边界。通过透明边界,这意味着如果透明边界设置为 true,则匹配器将匹配超出区域边界的匹配模式以获得匹配。此方法返回具有修改后的透明边界的匹配器。
句法:
public boolean useTransparentBounds(
boolean setTransparentBounds)
参数:此方法采用参数setTransparentBounds ,它是一个布尔值,描述了要修改的匹配器的透明边界。
返回值:此方法返回具有修改后的透明边界的匹配器。
下面的示例说明了 Matcher.useTransparentBounds() 方法:
示例 1:
// Java code to illustrate useTransparentBounds() 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);
// set the transparent bounds to true
// using useTransparentBounds() method
matcher = matcher
.useTransparentBounds(true);
// Check if this matcher
// has transparent bounds or not
System.out.println("Does this matcher"
+ " has transparent bounds: "
+ matcher.hasTransparentBounds());
}
}
输出:
Does this matcher has transparent bounds: true
示例 2:
// Java code to illustrate useTransparentBounds() method
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
// Get the regex to be checked
String regex = "(FGF)";
// 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 transparent bounds to true
// using useTransparentBounds() method
matcher = matcher
.useTransparentBounds(false);
// Check if this matcher
// has transparent bounds or not
System.out.println("Does this matcher"
+ " has transparent bounds: "
+ matcher.hasTransparentBounds());
}
}
输出:
Does this matcher has transparent bounds: false
参考: https://docs.oracle.com/javase/9/docs/api/ Java/util/regex/Matcher.html#useTransparentBounds-boolean-