A Java Class: User.java
package com.pkm.reflection;
public class User {
String firstName;
String lastname;
}
Example Runner Class: GetAllFieldsAndValues.java
package com.pkm.reflection;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
public class GetAllFieldsAndValues {
public static void main(String[] args) {
User user = new User();
user.firstName = "Pritom";
user.lastname = "Mondal";
try {
Map dataMap = GetAllFieldsAndValues.collectFieldValues(user);
for (Object entry : dataMap.entrySet()) {
Map.Entry mapEntry = (Map.Entry) entry;
System.out.println("Key : " + mapEntry.getKey() + ", Value : "
+ mapEntry.getValue());
}
} catch (Exception ex) {
System.out.println("\n\nError: " + ex.getMessage());
}
}
public static Map collectFieldValues(Object object) throws Exception {
Map dataMap = new HashMap();
Class obj = object.getClass();
for (Field field : obj.getDeclaredFields()) {
field.setAccessible(true);
Object value = field.get(object);
dataMap.put(field.getName(), value);
}
return dataMap;
}
}
Example Output:
Key : lastname, Value : Mondal
Key : firstName, Value : Pritom