Java Matcher toString()用法及代码示例

Matcher类的toString()方法用于获取此匹配器的String表示形式。此方法派生自Object Class，其行为类似。

用法:

public String toString()

参数：此方法不带参数。

返回值：此方法返回一个String值，它是此匹配器的String表示形式。

下面的示例说明Matcher.toString()方法：

示例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=]

示例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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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 toString() 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。