Java 中 Matcher toString()方法，带示例
原文:https://www . geesforgeks . org/matcher-tostring-method-in-Java-with-examples/
匹配器类的 toString() 方法用于获取该匹配器的字符串表示。此方法从对象类派生而来，其行为方式类似。
语法:
public String toString()
参数:该方法不取参数。
返回值:这个方法返回一个字符串值，这是这个匹配器的字符串表示。
以下示例说明了 Matcher.toString()方法:
例 1:
// Java code to illustrate toString() 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
= " Geeks for For Geeks Geek";
// Create a matcher for the input String
Matcher matcher
= pattern.matcher(stringToBeMatched);
// Get the String representation of this matcher
// using toString() method
System.out.println(matcher.toString());
}
}
输出:
java.util.regex.Matcher[pattern=(Geeks) region=0,25 lastmatch=]
例 2:
// Java code to illustrate toString() 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
= "FGF GFG GFG FGF";
// Create a matcher for the input String
Matcher matcher
= pattern.matcher(stringToBeMatched);
// Get the String representation of this matcher
// using toString() method
System.out.println(matcher.toString());
}
}
输出:
java.util.regex.Matcher[pattern=(GFG) region=0,15 lastmatch=]
参考:https://docs . Oracle . com/javase/9/docs/API/Java/util/regex/matcher . html # toString–
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