Get the class By way of a string : Class Loader « Reflection « Java Tutorial

1. Java Tutorial
2. Reflection
3. Class Loader

public class Main {
  public static void main(String[] argv) throws Exception {
    Object object = new String();

    try {
      Class cls = Class.forName("java.lang.String");
    } catch (ClassNotFoundException e) {
    }
  }
}