java.lang.reflect.Field

Again, instances of this class are only created by the JVM, upon calls to Class::getField().

• public Object get(Object) - the parameter had better be an object of the same class type as getDeclaringClass(). Then, it returns the value stored in the field of that object. (Does security checks, etc. too.)
• public void set(Object obj, Object val) - obj should be same class type as getDeclClass(), val be the same class type as getType(). Then it sets the field of the obj object to the val.

  (If working with static fields, the obj arguments can be null.)

• Other interesting methods: getType() of the field, getDeclaringClass(), getModifiers(), getName()

Implementation: the class contains private variables:

    private Class               clazz;     // returned by getDeclaringClass()
    private int                 slot;       // ???
    private String              name;      // ret. by getName()
    private Class               type;      // ret. by getType()
    private int                 modifiers; // ret. by getModifiers()

The get() and set() methods are native- most others are Java code.