Set field for object using field name (Java Reflection)

Question

I have an array with field names - fieldNamesArr and array with values for those fields - fieldValuesArr. Also I have Object obj,created form class Class using .newInstanse();.

How can I set appropriate fields in obj using this two arrays?
(we're assuming that obj has all of this fields and they are public)

Class ourClass = Definer.getClassByName(tmpStrArr[1]);
obj = ourClass.newInstance();

List<String> fieldNamesArr = new ArrayList<>();
List<String> fieldValuesArr = new ArrayList<>();

[remark 1] Supposed that obj doesn't have a complex fields (just primitive types)

If I simply paste the question title into Google I get lots of results. Have you tried anything? — Alex Hall
– Alex Hall, Commented Apr 10, 2016 at 19:52

Dmitry T. · Accepted Answer · 2016-04-10 20:09:22Z

1

I just found a solution. It should look something like that, I guess:

int i=0;        
for (String tmpStr: fieldNamesArr) {
   Field field = ourClass.getField(tmpStr);   

   //converting string from fieldValuesArr[i] to required type //   

   field.set(obj,value);
   i++
}

answered Apr 10, 2016 at 20:09

Dmitry T.

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