Java Matcher reset()用法及代碼示例

Matcher Class的reset()方法用於重置此Matcher。

用法:

public Matcher reset()

參數：此方法不帶任何參數。

返回值：重置後，此方法返回此Matcher。

下麵的示例說明Matcher.reset()方法：

示例1:

// Java code to illustrate reset() 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"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern.matcher(stringToBeMatched); 
  
        // Reset the Matcher using reset() method 
        matcher = matcher.reset(); 
  
        // Get the current matcher state 
        System.out.println(matcher.toMatchResult()); 
    } 
}

輸出：

java.util.regex.Matcher[pattern=Geeks region=0, 13 lastmatch=]

示例2:

// Java code to illustrate reset() 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"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern.matcher(stringToBeMatched); 
  
        // Reset the Matcher using reset() method 
        matcher = matcher.reset(); 
  
        // Get the current matcher state 
        System.out.println(matcher.toMatchResult()); 
    } 
}

輸出：

java.util.regex.Matcher[pattern=GFG region=0, 19 lastmatch=]

參考： Oracle Doc

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