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java 橋形式(Bridge Pattern)
Bridge形式解耦,其實行的界說。它是一種構造形式。本形式觸及充任橋的接口。這座橋使詳細的類自力的接話柄施者類。
Bridge形式解耦,其實行的界說。它是一種構造形式。
本形式觸及充任橋的接口。這座橋使詳細的類自力的接話柄施者類。
這兩品種型的類可以在不影響彼此被轉變。
實例:
interface Printer {
public void print(int radius, int x, int y);
}//from www.j a v a2 s . c om
class ColorPrinter implements Printer {
@Override
public void print(int radius, int x, int y) {
System.out.println("Color: " + radius +", x: " +x+", "+ y +"]");
}
}
class BlackPrinter implements Printer {
@Override
public void print(int radius, int x, int y) {
System.out.println("Black: " + radius +", x: " +x+", "+ y +"]");
}
}
abstract class Shape {
protected Printer print;
protected Shape(Printer p){
this.print = p;
}
public abstract void draw();
}
class Circle extends Shape {
private int x, y, radius;
public Circle(int x, int y, int radius, Printer draw) {
super(draw);
this.x = x;
this.y = y;
this.radius = radius;
}
public void draw() {
print.print(radius,x,y);
}
}
public class Main {
public static void main(String[] args) {
Shape redCircle = new Circle(100,100, 10, new ColorPrinter());
Shape blackCircle = new Circle(100,100, 10, new BlackPrinter());
redCircle.draw();
blackCircle.draw();
}
}
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