修饰符是 Java 中的一个简单(mod)方法，示例

原文:https://www . geesforgeks . org/modifier-isvolatilemd-method-in-Java-with-examples/

Java . lang . reflect . modifier的 isVolatile(mod) 方法用于检查整数参数是否包含 Volatile 修饰符。如果此整数参数表示可变类型修饰符，则方法返回 true，否则返回 false。

语法:

public static boolean isVolatile(int mod)

参数:该方法接受整数 mod 作为参数，表示一组修饰符。

返回:如果 mod 包含 volatile 修饰符，则该方法返回 true 否则为假。

以下程序说明 isVolatile()方法: 程序 1:

// Java program to illustrate isVolatile() method

import java.lang.reflect.*;

public class GFG {

    volatile static String field1 = "GeeksForGeeks";

    public static void main(String[] args)
        throws NoSuchFieldException,
               SecurityException
    {

        // get Field class object
        Field field
            = GFG
                  .class
                  .getDeclaredField("field1");

        // get Modifier Integer value
        int mod = field.getModifiers();

        // check Modifier is volatile or not
        boolean result
            = Modifier.isVolatile(mod);

        System.out.println("Mod integer value "
                           + mod
                           + " is volatile : "
                           + result);
    }
}

Output:

Mod integer value 72 is volatile : true

程序 2:

// Java program to illustrate isVolatile()

import java.lang.reflect.*;

public class GFG {

    volatile Long number
        = 139892824314253L;

    public static void main(String[] args)
        throws NoSuchFieldException,
               SecurityException
    {

        // get Field class object
        Field field
            = GFG
                  .class
                  .getDeclaredField("number");

        // get Modifier Integer value
        int mod = field.getModifiers();

        // check Modifier is volatile or not
        boolean result
            = Modifier.isVolatile(mod);

        System.out.println("Mod integer value "
                           + mod
                           + " is volatile : "
                           + result);
    }
}

Output:

Mod integer value 64 is volatile : true

参考文献:https://docs . Oracle . com/javase/10/docs/API/Java/lang/reflect/modifier . html # isVolatile(int)

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