How to get string value from a Java field via reflection?

Just usefull example code for reflection fields:

Field[] fields = InsanceName.getDeclaredFields();
for (Field field : fields) {      //array for fields names

System.out.println("Fields: " + Modifier.toString(field.getModifiers())); // modyfiers
System.out.println("Fields: " + field.getType().getName());  //type var name
System.out.println("Fields: " + field.getName());        //real var name
field.setAccessible(true);                                //var readable
System.out.println("Fields: " + field.get(InsanceName));  //get var values  
System.out.println("Fields: " + field.toString());     //get "String" values
System.out.println("");  //some space for readable code
}

In ideal situations,Class does not hold data. It merely holds the information about the structure and behavior of its instances and Instances of the Classes hold your data to use. So your extractStringFromField method can not extract values unless you pass any instances (from where it will actually extract values).

If the name of the parameter of the reference, you are passing to extract value is instance, then you can easily get what you want like bellow:

String strValue = (String)field.get(instance);

It looks like you need a reference to an instance of the class. You would want to call get and pass in the reference, casting the return to a String.

You can use get as follows:

String strValue = (String) field.get (objectReference);