Here you can find the source of classForName(String columnType)
protected static Class classForName(String columnType)
//package com.java2s; //License from project: Open Source License import java.util.HashMap; public class Main { protected static HashMap<String, Class> loadedClasses = new HashMap<String, Class>(); protected static Class classForName(String columnType) { try {/*from w w w . ja v a 2s . c om*/ Class c = loadedClasses.get(columnType); if (c == null) { c = Class.forName(columnType); loadedClasses.put(columnType, c); } return c; } catch (ClassNotFoundException e) { throw new RuntimeException(e); } } }