Java Modifier isFinal(mod)用法及代码示例

java.lang.reflect.Modifier的isFinal(mod)方法用于检查integer参数是否包含final修饰符。如果此整数参数表示最终类型Modifier，则方法返回true，否则返回false。

用法:

public static boolean isFinal(int mod)

参数：此方法接受整数名称，因为mod代表一组修饰符。

返回：如果mod包含final修饰符，则此方法返回true；否则，返回false。否则为假。

以下示例程序旨在说明isFinal()方法：
示例1:

// Java program to illustrate isFinal() method 
  
import java.lang.reflect.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // get Method class object 
        Method[] methods 
            = Shape.class.getMethods(); 
  
        // get Modifier Integer value 
        int mod = methods[0].getModifiers(); 
  
        // check Modifier is final or not 
        boolean result = Modifier.isFinal(mod); 
  
        System.out.println("Mod integer value "
                           + mod + " is final : "
                           + result); 
    } 
  
    class Shape { 
  
        public final void drawShape() {} 
    } 
}

输出：

Mod integer value 17 is final : true

示例2:

// Java program to illustrate isFinal() 
  
import java.lang.reflect.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // get Method class object 
        Method[] methods 
            = Numbers.class.getMethods(); 
  
        // get Modifier Integer value 
        int mod1 = methods[0].getModifiers(); 
        int mod2 = methods[1].getModifiers(); 
  
        // check Modifiers are final or not 
        boolean result1 = Modifier.isFinal(mod1); 
        boolean result2 = Modifier.isFinal(mod2); 
  
        // print results 
        System.out.println("Mod integer value "
                           + mod1 + " for method "
                           + methods[0].getName() 
                           + " is final : "
                           + result1); 
  
        System.out.println("Mod integer value "
                           + mod2 + " for method"
                           + methods[1].getName() 
                           + " is final : "
                           + result2); 
    } 
  
    // sample final class 
    abstract class Numbers { 
  
        public abstract int initializeNumber(); 
        public final int declareNumbers() 
        { 
            return 0; 
        } 
    } 
}

输出：

Mod integer value 1025 for method initializeNumber is final : false
Mod integer value 17 for methoddeclareNumbers is final : true

参考文献： https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Modifier.html#isFinal(int)

相关用法

注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 Modifier isFinal(mod) 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。