Java Reference
In-Depth Information
public PublicPerson() {
}
public String toString() {
return "Person: id=" + this.id + ", name=" + this.name;
}
}
Listing 3-13.
Accessing Fields Using Reflection
// FieldAccessTest.java
package com.jdojo.reflection;
import java.lang.reflect.Field;
public class FieldAccessTest {
public static void main(String[] args) {
Class<PublicPerson> ppClass = PublicPerson.class;
try {
// Create an object of PublicPerson class
PublicPerson p = ppClass.newInstance();
// Get the reference of name field
Field name = ppClass.getField("name");
// Get the current value of name field
String nameValue = (String) name.get(p);
System.out.println("Current name is " + nameValue);
// Set the value of name to Ann
name.set(p, "Ann");
// Get the new value of name field
nameValue = (String) name.get(p);
System.out.println("New name is " + nameValue);
}
catch (InstantiationException | IllegalAccessException |
NoSuchFieldException | SecurityException |
IllegalArgumentException e) {
System.out.println(e.getMessage());
}
}
}
Current name is Unknown
New name is Ann
