Class.forName("binary name");
加載并對類變量進行初始化
等價cl.loadClass("binary name").newInstance();
ClassLoader.loadClass("binary name");
ClassLoader cl = this.getClass().getClassLoader();
Class c = cl.loadClass("binary name");
Object obj = c.newInstance();
在newInstance時初始化
初始化時會比forName多產生一個obj對象
From : http://waryist.iteye.com/blog/131983