/**
 * 
 * @author yujie.wang
 *
 */
public class CreateObjectTest {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//createByNew();
		String classFullPathName = "com.yujie.createbean.Player";
		createByReflect1(classFullPathName);
		createByReflect2();
		createByReflect3();
	}
	
	/**
	 * 通過new關鍵字建立物件 一定顯示地呼叫建構函式
	 */
	public static void createByNew(){
		Player yujie = new Player(20,"yujie.wang");
		yujie.introduceMyself();
	}
	
	/**
	 * 通過反射Class.forName(classFullPathName).newInstance()建立物件
	 * 一定要呼叫預設的無參建構函式
	 * @param classFullPathName
	 */
	public static void createByReflect1(String classFullPathName){
		if(classFullPathName == null || classFullPathName.isEmpty()){
			System.out.println("classFullPathName == null || classFullPathName.isEmpty()");
		}
		Player yujie = null;	
		try {
			yujie = (Player)Class.forName(classFullPathName).newInstance();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		
		if(yujie != null){
			yujie.introduceMyself();
		}else {
			System.out.println("yujie == null");
		}
	}
	
	/**
	 * 通過反射Class.forName(classFullPathName).newInstance()建立物件
	 * 一定要呼叫預設的無參建構函式
	 */
	public static void createByReflect2(){
		try {
			Player yujie = Player.class.newInstance();
			yujie.introduceMyself();
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
	/**
	 * 通過反射Player.class.getConstructor(int.class,String.class).newInstance()建立物件
	 * 一定要呼叫相應的建構函式
	 */
	public static void createByReflect3(){
		try {
			Constructor<Player> c = Player.class.getConstructor(int.class,String.class);
			Player yujie = c.newInstance(20,"yujie.wang");
			yujie.introduceMyself();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
	}
}