Getting and Setting the Value of a Field (assumes that the field has the type int) : Field « Reflection « Java Tutorial

1. Java Tutorial
2. Reflection
3. Field

import java.lang.reflect.Field;

public class Main {
  public static void main(String[] argv) throws Exception {
    Class cls = java.awt.Point.class;

    Field field = cls.getField("x");

    // Get value
//    field.getInt(object);

    // Set value
  //  field.setInt(object, 123);

    // Get value of a static field
    field.getInt(null);

    // Set value of a static field
    field.setInt(null, 123);

  }
}