import java.lang.reflect.Array;
 
class ObjectTest <T> {
    public T[] generateArray(T newObj) {
        Class<?> newClass = newObj.getClass();
        T[] returnObject = (T[]) Array.newInstance(newClass, 50);
        return returnObject;
    }
 
    public static void main(String[] args) {
        ObjectTest<String> ot = new ObjectTest<>();
        String str = "one";
        String[] array = ot.generateArray(str);
        array[20] = "zero";
        System.out.println(array[20]);
        System.out.println(array.getClass());
    }
}

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