桥接模式概述及Java示例代码
// 定义桥接接口
interface DrawAPI {
void drawCircle(int radius, int x, int y);
}
// 实现桥接接口的具体类
class RedCircle implements DrawAPI {
public void drawCircle(int radius, int x, int y) {
System.out.println("Drawing Circle[ color: red, radius: " + radius + ", x: " + x + ", y: " + y + "]");
}
}
// 实现桥接接口的另一个具体类
class GreenCircle implements DrawAPI {
public void drawCircle(int radius, int x, int y) {
System.out.println("Drawing Circle[ color: green, radius: " + radius + ", x: " + x + ", y: " + y + "]");
}
}
// 使用桥接接口的抽象类
abstract class Shape {
protected DrawAPI drawAPI;
protected Shape(DrawAPI drawAPI){
this.drawAPI = drawAPI;
}
public abstract void draw();
}
// 扩展抽象类的实体类
class Circle extends Shape {
private int x, y, radius;
public Circle(int x, int y, int radius, DrawAPI drawAPI) {
super(drawAPI);
this.x = x;
this.y = y;
this.radius = radius;
}
public void draw() {
drawAPI.drawCircle(radius,x,y);
}
}
// 测试桥接模式
public class BridgePatternDemo {
public static void main(String[] args) {
Shape redCircle = new Circle(100,100, 10, new RedCircle());
Shape greenCircle = new Circle(100,100, 10, new GreenCircle());
redCircle.draw();
greenCircle.draw();
}
}
