Java反射

示例1：获取对象的类名

public static void main(String[] args) throws IOException {
    Date date = new Date();
    System.out.println(date.getClass().getName());
    System.out.println(date.getClass().getSimpleName());
}

示例2：通过完整类名生成对象

public static void main(String[] args)  throws Exception {
    String className = "java.util.Random";
    Random random = (Random) Class.forName(className).newInstance();
    for(int i =0;i