The isSynthetic() method of java.lang.reflect.Field is used to check whether Field Object is a synthetic field or not. If the field is a synthetic field then the function returns true otherwise it will return false. Synthetic Construct: Synthetic Construct is Class, Fields, and Methods that are created by the Java compiler for internal purposes. Syntax:
public boolean isSynthetic()
Parameters: This method accepts nothing. Return: This method returns true if and only if this field is a synthetic field as defined by the Java Language Specification. Below programs illustrate isSynthetic() method: Program 1:
Java
// Java program to illustrate isSynthetic() methodimport 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 classclass Numbers { // static short value public static long value = 3114256;} |
Output:
The Field is isSynthetic: false
Program 2:
Java
// Java program to illustrate isSynthetic() methodimport 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()); } }} |
Output: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
References: https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#isSynthetic–java
