Java Pattern flags()方法及示例

来源：这里教程网时间：2026-02-17 21:05:10 作者：

Java Pattern flags()方法及示例

Java中 Pattern 类的 flags() 方法是用来返回模式的匹配标志的。匹配标志是一个位掩码，可能包括CASE_INSENSITIVE, MULTILINE, DOTALL, UNICODE_CASE, CANON_EQ, UNIX_LINES, LITERAL, UNICODE_CHARACTER_CLASS和COMMENTS标志。

语法

public int flags()

参数： 该方法不接受任何参数。

返回值： 该方法返回模式的匹配标志。

下面的程序说明了flags()方法。

程序1 :

// Java program to demonstrate// Pattern.flags() method  import java.util.regex.*;  public class GFG {    public static void main(String[] args)    {        // create a REGEX String        String REGEX = "(.*)(for)(.*)?";          // create the string        // in which you want to search        String actualString            = "code of Machine";          // compile the regex to create pattern        // using compile() method        Pattern pattern = Pattern.compile(REGEX,                          Pattern.CASE_INSENSITIVE);          // find the flag of pattern        int flag = pattern.flags();          System.out.println("Pattern's match flag = "                           + flag);    }}

输出:

Pattern's match flag = 2

程序2

// Java program to demonstrate// Pattern.compile method  import java.util.regex.*;  public class GFG {    public static void main(String[] args)    {          // create a REGEX String        String REGEX = "(.*)(ee)(.*)?";          // create the string        // in which you want to search        String actualString            = "geeks";          // compile the regex to create pattern        // using compile() method        Pattern pattern = Pattern.compile(REGEX,                                  Pattern.MULTILINE);          // find the flag of pattern        int flag = pattern.flags();          System.out.println("Pattern's match flag = "                           + flag);    }}

输出: