b idea 的 uml類圖

type	subtype	example
extends 繼承	interface extends interface	public interface Aunt extends GrandFather, GrandMother
	class extendsabstract class	public class Cousin extends Uncle
	class extends class	public class Son extends Father
implements 實現	abstract class implements interface	public abstract class Uncle implements GrandFather
	class implements interface	public class Father extends GrandFather
implements 實現	abstract class implements interface	public abstract class Uncle implements GrandFather
	class implements interface	public class Father extends GrandFather
include 包含	single filed in class	Son 中有father 的field
	many filed in class	Son 中有Uncle 的field 數組
denpency 依賴	single filed in method	Cousin 的方法中使用了Aunt