The getDeclaringClass() method of java.lang.reflect.Field is used to get the Class object which declares the field represented by this Field object. If Field object is present and we want to get the class object then we can get that class object using this method.
Syntax:
public Class<T> getDeclaringClass()
Parameters: This method accepts nothing.
Return value: This method returns an object representing the declaring class of the underlying member.
Below programs illustrate getDeclaringClass() method:
Program 1:
// Java program to demonstrate the above method import java.lang.reflect.Field; public class GFG { public static void main(String[] args) throws NoSuchFieldException, SecurityException { // Get the value field object Field field = User.class .getField("identificationChar"); // get the declaring class object Class declaringClass = field.getDeclaringClass(); // print result System.out.println("Declaring Class" + " for Field Object: " + declaringClass); }} // sample User classclass User { // static char values public static char identificationChar = 'E'; public static char selectionChar = 'A'; public static String name = "Aman"; // getter and setter methods public static char getIdentificationChar() { return identificationChar; } public static void setIdentificationChar(char identificationChar) { User.identificationChar = identificationChar; } public static char getSelectionChar() { return selectionChar; } public static void setSelectionChar(char selectionChar) { User.selectionChar = selectionChar; } public static String getName() { return name; } public static void setName(String name) { User.name = name; }} |
Output:
Declaring Class for Field Object: class User
Program 2:
// Java program to demonstrate the above method import java.lang.reflect.Field; import java.lang.reflect.Field; public class GFG { public static void main(String[] args) throws NoSuchFieldException, SecurityException { // Get the value field object Field field = Alphabets.class.getField("value"); // get the declaring class object Class declaringClass = field.getDeclaringClass(); // print result System.out.println("Declaring Class: " + declaringClass); } // Alphabets class static class Alphabets { // char field public static char value = 'Q'; // getter and setter methods public static char getValue() { return value; } public static void setValue(char value) { Alphabets.value = value; } }} |
Output:
Declaring Class: class GFG$Alphabets
References: https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#getDeclaringClass–
