我是新來的Java和麪向對象,所以如果我不清楚道歉。從另一個類中獲取字段和方法
我一直在使用Env3D作出了水族館,想申請的SOLID
的原則我有一個Simulation
類,Token
類,Fish
類的。
我的Token
類目前處理產生魚及其行爲。 理想情況下,我希望行爲是從Token
類中分離出來的一類。
我需要我的Fish
擴展兩個類,Token
和Behavior
,我知道這是不可能的。
我該怎麼做? Fish
可以實現Behavior
接口,但它如何從Behavior
類獲得字段和方法?
Token類
package UserCode;
/**
* It's a Token!
*
* @author (Tom)
* @version (02.03.2017)
*/
public class Token
{
// Env3d-defined object-specific fields:
// Reference to the 3D model, called 'model':
String model;
// Reference to texture-map, called 'texture':
String texture;
// Scale factor applied to model:
double scale;
// Position in 3D world (x,y,z coordinates):
double x;
// Position in 3D world (x,y,z coordinates):
double y;
// Position in 3D world (x,y,z coordinates):
double z;
// Orientation (about x,y,z):
double rotateX;
// Orientation (about x,y,z):
double rotateY;
// Orientation (about x,y,z):
double rotateZ;
// Set transparency to true:
boolean transparent=true;
public void setModel(String model){
this.model = model;
}
public void setScale(double scale){
this.scale = scale;
}
public void setTexture(String texture){
this.texture = texture;
}
public void move()
{
// rotate about y axis
//rotateY += 1;
}
public void setOrientationX(double x)
{
// set position
this.rotateX = x;
}
public void setOrientationY(double y)
{
// set position
this.rotateY = y;
}
public void setOrientationZ(double z)
{
// set position
this.rotateZ = z;
}
public void setPositionX(double x)
{
// set position
this.x = x;
}
public void setPositionY(double y)
{
// set position
this.y = y;
}
public void setPositionZ(double z)
{
// set position
this.z = z;
}
}
JavaFish類
package UserCode;
/**
* <h1>Aquarium: JavaFish</h1>
* <p>This class generates and controls the JavaFish in the Aquarium.
* <p>The characteristics of the JavaFish are to swim horizontelly, backwards and forwards.
*
*@version 1.0.0
*@author Tom
*/
public class JavaFish extends Token
{
private double _xspeed = 0.08;
/**
* Creates the JavaFish and initilises instance/object variables of images of JavaFish and Aquarium.
* The second initilises position and orientation. These come from the Framework package.
*/
public JavaFish()
{
setModel("models/billboard/billboard.obj");
setScale(0.5);
setTexture("textures/javaFish/JavaFish.png");
setPositionX(1.0);
setPositionY(5.0);
setPositionZ(1.0);
setOrientationX(0);
setOrientationY(-90);
setOrientationZ(0);
}
public void move()
{
// JavaFish x-axis assigned to move forwards (+=) by instance varible in constructor
x += _xspeed;
// Flip JavaFish orientation and change direction if fish reaches specific x-axis point
if (x < 2)
{
_xspeed = 0.05;
setOrientationY(-90);
} else if (x > 8){
_xspeed = -0.05;
setOrientationY(90);
}
}
}
假設行爲定義了魚的行爲(例如它是如何移動的),邏輯的方法是將行爲作爲一個單獨的類離開,並在'魚'中有一個像'setBehavior'這樣的方法。請參閱[訪問者模式](https://en.wikipedia.org/wiki/Visitor_pattern)。很難說,雖然沒有看到「行爲」的實際代碼。 – Paul
「我的令牌類目前處理產生魚類和他們的行爲」如果這是你的目標,那麼我不明白爲什麼'魚類'應該擴展任何這些類。行爲可以組成魚類(作爲一個類變量),'Token'應該創建每個'Fish'並傳遞它是相應的行爲。 – moondaisy