1、核心意图：
package qinysong.pattern.adapter;
public class Point {
private int coordinateX; private int coordinateY;
public Point(int coordinateX, int coordinateY){ this.coordinateX = coordinateX; this.coordinateY = coordinateY;
} public String toString(){ return "Point[x=" + coordinateX + ",y=" + coordinateY + "]"; } public int getCoordinateX() { return coordinateX; } public int getCoordinateY() { return coordinateY; }
}package qinysong.pattern.adapter;public interface Shape { public Point getBottomLeftPoint(); public Point getTopRightPoint();}package qinysong.pattern.adapter;public class TextView { public int getCoordinateX() { System.out.println("TextView.getCoordinateX()..."); return 10; } public int getCoordinateY() { System.out.println("TextView.getCoordinateY()..."); return 20; } public int getHeight() { System.out.println("TextView.getHeight()..."); return 30; } public int getWidth() { System.out.println("TextView.getWidth()..."); return 40; } public boolean isEmpty(){ return false; }}package qinysong.pattern.adapter;public class TextShape implements Shape { private TextView textView; public TextShape(TextView textView){ this.textView = textView; } //通过TextView的实例进行协调实现 public Point getBottomLeftPoint() { System.out.println("TextShape.getBottomLeftPoint()..."); int coordinateX = textView.getCoordinateX(); int coordinateY = textView.getCoordinateY(); return new Point(coordinateX, coordinateY); } //通过TextView的实例进行协调实现 public Point getTopRightPoint() { System.out.println("TextShape.getTopRightPoint()..."); int coordinateX = textView.getCoordinateX(); int coordinateY = textView.getCoordinateY(); int height = textView.getHeight(); int width = textView.getWidth(); return new Point(coordinateX + width, coordinateY + height); }}package qinysong.pattern.adapter;public class Client { public static void main(String[] args){ System.out.println("Client.main begin .........."); System.out.println("Client.main 以下是通过实例委托方式实现的Adapter"); Shape shape = new TextShape(new TextView()); Point bottomLeft = shape.getBottomLeftPoint(); Point topRight = shape.getTopRightPoint(); System.out.println("Client.main shape‘s bottomLeft:" + bottomLeft); System.out.println("Client.main shape‘s topRight:" + topRight); System.out.println(" Client.main 以下是通过类继承方式实现的Adapter"); Shape shape2 = new TextShape2(); bottomLeft = shape2.getBottomLeftPoint(); topRight = shape2.getTopRightPoint(); System.out.println("Client.main shape2‘s bottomLeft:" + bottomLeft); System.out.println("Client.main shape2‘s topRight:" + topRight); System.out.println("Client.main end .........."); }}package qinysong.pattern.adapter;public class TextShape2 extends TextView implements Shape { //通过所继承的TextView,进行协调实现 public Point getBottomLeftPoint() { System.out.println("TextShape2.getBottomLeftPoint()..."); int coordinateX = getCoordinateX(); int coordinateY = getCoordinateY(); return new Point(coordinateX, coordinateY); } //通过所继承的TextView,进行协调实现 public Point getTopRightPoint() { System.out.println("TextShape2.getTopRightPoint()..."); int coordinateX = getCoordinateX(); int coordinateY = getCoordinateY(); int height = getHeight(); int width = getWidth(); return new Point(coordinateX + width, coordinateY + height); } //注意: 这一点体现了类模式的优势,可以很方便地重定义父类TextView中的方法 public int getCoordinateX() { System.out.println("TextShape2.getCoordinateX()..."); return 100; }}java设计模式—Adapter模式,布布扣,bubuko.com
原文：http://www.cnblogs.com/duanxz/p/3633917.html