I have got a list of constants in a class like:
public class constants{
public String avg_label ="......";
public String count_label="......";
}
While calling , is it possible to do something like this:
public class MapDialogue{
Constants c1 = new Constants();
public String mappingLabels(String node){
String text = "c1."+node+"_label";
//Is there someway of parsing this text as code
//like in unix shell scripting?
}
}
Yes, you could use Reflection. And the code would look something like this:
String value = (String)Constants.class.getDeclaredField(node).get(c1);
Although, I am kind of unsure about a couple of things:
Constants class? You should be accessing them like Constants.FIELD_NAME.I suppose in your case, you would most likely be better of using some sort of Map
HashMap would definitely be more practical instead of reflection. You could put what is supposed to be the field name as the key, and its corresponding value as, well, the value. It would look something like this: map.put("avg_label", ".....");Yes, there is a way to achieve that. You can do so via the Reflection package in the Field API. The Java tutorials for this can be located here.
The basic idea is:
Field yourField = c1.getClass().getDeclaredField(yourString);
As a side note, a Constants file usually has its members as public static final. With those modifiers, you won't need to create an instance of Constants, and the values will also be unmodifiable.
