Java Matcher regionEnd()用法及代碼示例

Matcher類的regionEnd()方法用於獲取要與當前匹配器中的模式匹配的區域的endIndex。此方法返回一個整數值，該值是此匹配器區域的endIndex。

用法:

public int regionEnd()

參數：此方法不帶參數。

返回值：此方法返回一個整數值，該值是此匹配器區域的endIndex。

下麵的示例說明Matcher.regionEnd()方法：

示例1:

// Java code to illustrate regionEnd() 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); 
  
        // Get previous endIndex of region 
        // using regionEnd() method 
        System.out.println("Before changing region, "
                           + " Region ends from: "
                           + matcher.regionEnd()); 
  
        // Restrict the region to 0, 10 
        matcher = matcher.region(0, 10); 
  
        // Get previous endIndex of region 
        // using regionEnd() method 
        System.out.println("After changing region, "
                           + " Region ends from: "
                           + matcher.regionEnd()); 
    } 
}

輸出：

Before changing region,  Region ends from: 38
After changing region,  Region ends from: 10

示例2:

// Java code to illustrate regionEnd() 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 
            = "GFGFGFGFGFGFGFGFGFG FGF GFG GFG FGF"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern.matcher(stringToBeMatched); 
  
        // Get previous endIndex of region 
        // using regionEnd() method 
        System.out.println("Before changing region, "
                           + " Region ends from: "
                           + matcher.regionEnd()); 
  
        // Restrict the region to 0, 5 
        matcher = matcher.region(0, 5); 
  
        // Get previous endIndex of region 
        // using regionEnd() method 
        System.out.println("After changing region, "
                           + " Region ends from: "
                           + matcher.regionEnd()); 
    } 
}

輸出：

Before changing region,  Region ends from: 35
After changing region,  Region ends from: 5

參考： https://docs.oracle.com/javase/9/docs/api/java/util/regex/Matcher.html#regionEnd–

相關用法

注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Matcher regionEnd() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。