解決循環依賴問題Java

Question

下面我發佈了一個帶有循環依賴關係的簡單Java代碼示例。

MyObject有兩個成員（myObject1和myObject2），它們具有對象本身的引用。

有沒有辦法解決依賴關係，但保持功能？

public abstract class AbstractMyObject { 

    public void myMethod(int param) { 
     System.out.println(param); 
    } 
} 

public class MyObject extends AbstractMyObject { 

    private MyObject1 myObject1; 
    private MyObject2 myObject2; 

    public MyObject() { 
     myObject1 = new MyObject1(this); 
     myObject2 = new MyObject2(this); 
     ... 
    } 

    private void aMethod() { 
     myObject1.doSomething(); 
     myObject2.doSomething(); 
    } 
} 

public class MyObjectWrapper { 
    private MyObject myObject; 

    public MyObjectWrapper (MyObject myObject) { 
     this.myObject = myObject; 
    } 

    public void myMethod(int param) { 
    this.myObject.myMethod(param); 
    } 
} 

public class MyObject1 extends MyObjectWrapper { 

    public MyObject1(MyObject myObject) { 
    super(myObject); 
    } 

    private void aMethod() { 
    myMethod(1); 
    } 

    public void doSomething() { 
    ... 
    } 
} 

public class MyObject2 extends MyObjectWrapper { 

    public MyObject2(MyObject myObject) { 
    super(myObject); 
    } 

    private void aMethod() { 
    myMethod(2); 
    } 

    public void doSomething() { 
    ... 
    } 
} 

Answer 1

申報接口：

public interface class MyInterface {  
    void myMethod(int param); 
} 

實現接口：

public class MyObject implements MyInterface { 

使用的界面，在包裝和後代，而不是具體類MyObject：

public class MyObjectWrapper { 
    private MyInterface myObject; 

    public MyObjectWrapper (MyInterface myObject) { 
     this.myObject = myObject; 
    } 

    public myMethod(int param) { 
    this.myObject.myMethod(param); 
    } 
}