Question

I was wondering whether it would be possible to have something like the following in Java:

public class MyClass {
    private String name;
    private Integer age;
    private Date dateOfBirth;
    // constructors, getters, setters

    public void setField(String aFieldName, Object aValue) {
        Field aField = getClass().getDeclaredField(aFieldName);
        // use: aField.set(...) with proper type handling
    }
 }

I am really stuck in the setField method and any idea would be very helpful.

Thanks!

EDIT: The reason for this is that I would like to have a method in another class like the following

public static MyClass setAll(List<String> fieldNames, List<Object> fieldValues) {
    MyClass anObject = new MyClass();
    // iterate fieldNames and fieldValues and set for each fieldName 
    // the corresponding field value
    return anObject;
}

Answer 1

Sure:

aField.set(this, aValue);

To do type checking first:

if (!aField.getType().isInstance(aValue))
    throw new IllegalArgumentException();

but since calling set with a value of the wrong type will generate an IllegalArgumentException anyway, that sort of check isn’t very useful.