Java Field isSynthetic()用法及代码示例

java.lang.reflect.Field的isSynthetic()方法用于检查Field Object是否为合成字段。如果该字段是合成字段，则该函数返回true，否则它将返回false。

合成构造：合成构造是Java编译器为内部目的而创建的类，字段和方法。

用法:

public boolean isSynthetic()

参数：此方法接受不接受任何内容。

返回：仅当此字段是Java语言规范定义的综合字段时，此方法才返回true。

以下示例程序旨在说明isSynthetic()方法：
示例1:

// Java program to illustrate isSynthetic() method 
  
import java.lang.reflect.Field; 
import java.time.Month; 
  
public class GFG { 
  
    public static void main(String[] args) 
        throws Exception 
    { 
  
        // Get field object 
        Field field 
            = Numbers.class.getField("value"); 
  
        // check field is synthetic or not 
        System.out.println( 
            "The Field is isSynthetic: "
            + field.isSynthetic()); 
    } 
} 
  
// sample Numbers class 
class Numbers { 
  
    // static short value 
    public static long value = 3114256; 
}

输出：

The Field is isSynthetic: false

示例2:

// Java program to illustrate isSynthetic() method 
  
import java.lang.reflect.Field; 
import java.time.DayOfWeek; 
  
public class GFG { 
  
    public static void main(String[] args) 
        throws Exception 
    { 
  
        // Get field object of Month class 
        Field[] fields 
            = DayOfWeek.class
                  .getDeclaredFields(); 
  
        for (int i = 0; i < fields.length; i++) { 
  
            // print name of Fields 
            System.out.println( 
                "The Field "
                + fields[i].toString() 
                + "\n is isSynthetic:"
                + fields[i].isSynthetic()); 
        } 
    } 
}

输出：

The Field public static final java.time.DayOfWeek java.time.DayOfWeek.MONDAY
is isSynthetic:false
The Field public static final java.time.DayOfWeek java.time.DayOfWeek.TUESDAY
is isSynthetic:false
The Field public static final java.time.DayOfWeek java.time.DayOfWeek.WEDNESDAY
is isSynthetic:false
The Field public static final java.time.DayOfWeek java.time.DayOfWeek.THURSDAY
is isSynthetic:false
The Field public static final java.time.DayOfWeek java.time.DayOfWeek.FRIDAY
is isSynthetic:false
The Field public static final java.time.DayOfWeek java.time.DayOfWeek.SATURDAY
is isSynthetic:false
The Field public static final java.time.DayOfWeek java.time.DayOfWeek.SUNDAY
is isSynthetic:false
The Field private static final java.time.DayOfWeek[] java.time.DayOfWeek.ENUMS
is isSynthetic:false
The Field private static final java.time.DayOfWeek[] java.time.DayOfWeek.$VALUES
is isSynthetic:true

参考文献： https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#isSynthetic–java

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