Field.setDouble(Object obj, double d) has the following syntax.
public void setDouble(Object obj, double d) throws IllegalArgumentException , IllegalAccessException
In the following code shows how to use Field.setDouble(Object obj, double d) method.
import java.lang.reflect.Field; //from w w w.j a v a2 s . com class MyClass { public double i = 1.123; } public class Main { public static void main(String[] args) throws Exception { Class<?> clazz = Class.forName("MyClass"); MyClass x = (MyClass) clazz.newInstance(); Field f = clazz.getField("i"); System.out.println(f.getDouble(x)); f.setDouble(x, 9.99); System.out.println(f.getDouble(x)); } }
The code above generates the following result.