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| /**
* 实现接口 - 绘图API接口
*/
public interface DrawingAPI {
void drawCircle(double x, double y, double radius);
void drawRectangle(double x, double y, double width, double height);
}
/**
* 具体实现 - OpenGL绘图API
*/
public class OpenGLDrawingAPI implements DrawingAPI {
@Override
public void drawCircle(double x, double y, double radius) {
System.out.printf("[OpenGL] 绘制圆形: 中心(%.1f, %.1f), 半径%.1f%n", x, y, radius);
}
@Override
public void drawRectangle(double x, double y, double width, double height) {
System.out.printf("[OpenGL] 绘制矩形: 起点(%.1f, %.1f), 宽%.1f, 高%.1f%n", x, y, width, height);
}
}
/**
* 具体实现 - DirectX绘图API
*/
public class DirectXDrawingAPI implements DrawingAPI {
@Override
public void drawCircle(double x, double y, double radius) {
System.out.printf("[DirectX] 绘制圆形: 中心(%.1f, %.1f), 半径%.1f%n", x, y, radius);
}
@Override
public void drawRectangle(double x, double y, double width, double height) {
System.out.printf("[DirectX] 绘制矩形: 起点(%.1f, %.1f), 宽%.1f, 高%.1f%n", x, y, width, height);
}
}
/**
* 抽象层 - 形状抽象类
*/
public abstract class Shape {
protected DrawingAPI drawingAPI; // 桥接：持有实现接口的引用
protected Shape(DrawingAPI drawingAPI) {
this.drawingAPI = drawingAPI;
}
public abstract void draw();
public abstract void resize(double factor);
// 可以在抽象层定义一些通用方法
public void changeDrawingAPI(DrawingAPI newAPI) {
this.drawingAPI = newAPI;
System.out.println("更换绘图API");
}
}
/**
* 精化抽象层 - 圆形
*/
public class Circle extends Shape {
private double x, y, radius;
public Circle(double x, double y, double radius, DrawingAPI drawingAPI) {
super(drawingAPI);
this.x = x;
this.y = y;
this.radius = radius;
}
@Override
public void draw() {
drawingAPI.drawCircle(x, y, radius);
}
@Override
public void resize(double factor) {
radius *= factor;
System.out.printf("圆形大小调整为原来的%.1f倍%n", factor);
}
// 圆形特有的方法
public void setRadius(double radius) {
this.radius = radius;
}
public double getRadius() {
return radius;
}
}
/**
* 精化抽象层 - 矩形
*/
public class Rectangle extends Shape {
private double x, y, width, height;
public Rectangle(double x, double y, double width, double height, DrawingAPI drawingAPI) {
super(drawingAPI);
this.x = x;
this.y = y;
this.width = width;
this.height = height;
}
@Override
public void draw() {
drawingAPI.drawRectangle(x, y, width, height);
}
@Override
public void resize(double factor) {
width *= factor;
height *= factor;
System.out.printf("矩形大小调整为原来的%.1f倍%n", factor);
}
// 矩形特有的方法
public void setDimensions(double width, double height) {
this.width = width;
this.height = height;
}
public double getArea() {
return width * height;
}
}
// 基础桥接模式演示
public class BasicBridgeDemo {
public static void main(String[] args) {
System.out.println("=== 桥接模式基础演示 ===");
// 创建不同的绘图API
DrawingAPI openGL = new OpenGLDrawingAPI();
DrawingAPI directX = new DirectXDrawingAPI();
System.out.println("\n=== 使用OpenGL绘制形状 ===");
Circle circle1 = new Circle(5, 5, 10, openGL);
Rectangle rect1 = new Rectangle(0, 0, 20, 15, openGL);
circle1.draw();
rect1.draw();
System.out.println("\n=== 使用DirectX绘制形状 ===");
Circle circle2 = new Circle(3, 3, 8, directX);
Rectangle rect2 = new Rectangle(2, 2, 25, 18, directX);
circle2.draw();
rect2.draw();
System.out.println("\n=== 运行时更换绘图API ===");
circle1.changeDrawingAPI(directX);
circle1.draw();
rect1.changeDrawingAPI(directX);
rect1.draw();
System.out.println("\n=== 调整形状大小 ===");
circle1.resize(1.5);
circle1.draw();
rect1.resize(0.8);
rect1.draw();
System.out.println("\n观察：形状(抽象)和绘图API(实现)可以独立变化！");
}
}
|