Java 獲取Class的三種方式

/**
 * 
 */
package freewill.classObject;

import freewill.objectequals.Employee;

/**
 * @author freewill
 * @desc 獲取Class的三種方式
 */
public class Demo {

	/**
	 * @desc 方法1：通過getClass獲取
	 * @return Class
	 */
	public Class<Employee> getClass1() {
		Employee e = new Employee();
		@SuppressWarnings("unchecked")
		Class<Employee> cl = (Class<Employee>) e.getClass();
		return cl;
	}

	/**
	 * @desc 方法2：通過靜態方法Class.forName獲取
	 * @return Class
	 * @throws ClassNotFoundException
	 */
	public Class<Employee> getClass2() throws ClassNotFoundException {
		String classname = "freewill.objectequals.Employee";
		@SuppressWarnings("unchecked")
		Class<Employee> cl = (Class<Employee>) Class.forName(classname);
		return cl;
	}

	/**
	 * @desc 方法3：通過類.class屬性獲取
	 * @return Class
	 */
	public Class<Employee> getClass3() {
		Class<Employee> cl = Employee.class;
		return cl;
	}

	public static void main(String[] args) throws ClassNotFoundException {
		Demo demo = new Demo();
		Class<Employee> class1 = demo.getClass1();
		System.out.println(class1.getName());

		Class<Employee> class2 = demo.getClass2();
		System.out.println(class2.getName());

		Class<Employee> class3 = demo.getClass3();
		System.out.println(class3.getName());
	}
}