Example of access and modify final static (inmutable) fields in Java

HackInmutable.java

import java.lang.reflect.Field;

public final class HackInmutable {
    static final class InmutableEmployee {
        private final int    id;
        private final String name; 
        private final Float  salary;
        
        private InmutableEmployee(final int id, final String name, final Float salary) {
            this.id     = id;
            this.name   = name;
            this.salary = salary;
        }
        
        public String name() { 
            return name; 
        }
    }
    
    public static void main(String...args) {
        InmutableEmployee employee = new InmutableEmployee(1, "John Doe", 100f);

        System.out.printf("The salary of %1$s is %2$s bitcoins. Salary should be hidden :/\n", employee.name(), giveMe(employee, "salary"));
        hackIt(employee, "salary", 50f);  // hack it!
        System.out.printf("The salary of %1$s now is %2$s bitcoins. WTF! \n", employee.name(), giveMe(employee, "salary"));
    }

    public static Object giveMe(final Object object, final String attribute) {
        try {
            Field theInmutableFielfd = object.getClass().getDeclaredField(attribute);
            theInmutableFielfd.setAccessible(true);
            return theInmutableFielfd.get(object);
        } catch (NoSuchFieldException     | 
                 IllegalArgumentException | 
                 IllegalAccessException   e) {
            return null;
        }
    }
    
    public static void hackIt(final Object object, final String attribute, final Object newValue) {
        try {
            Field theInmutableFielfd = object.getClass().getDeclaredField(attribute);
            theInmutableFielfd.setAccessible(true);
            theInmutableFielfd.set(object, newValue);
        } catch (NoSuchFieldException     | 
                 IllegalArgumentException | 
                 IllegalAccessException   e) {}
    }
}