桥接模式可以减少类的创建

矩阵类

public class Matrix {
    private String fileName;

    public Matrix(String fileName) {
        this.fileName = fileName;
    }

    public String getFileName() {
        return fileName;
    }
}

图片抽象类

public abstract class Image {
    protected ImageImp imp;

    public void setImp(ImageImp imp) {
        this.imp = imp;
    }

    public abstract void parseFile(String fileName);
}

BMP类

public class BMP extends Image {
    @Override
    public void parseFile(String fileName) {
        imp.doPaint(new Matrix(fileName));
    }
}

GIF类

public class GIF extends Image {
    @Override
    public void parseFile(String fileName) {
        imp.doPaint(new Matrix(fileName));
    }
}

JPEG类

public class JPEG extends Image {
    @Override
    public void parseFile(String fileName) {
        imp.doPaint(new Matrix(fileName));
    }
}

图片实现抽象类

public abstract class ImageImp {
    public abstract void doPaint(Matrix matrix);
}

Window实现类

public class WinImp extends ImageImp {
    @Override
    public void doPaint(Matrix matrix) {
        System.out.println("调用Windows系统的算法绘制像素矩阵："+matrix.getFileName());
    }
}

Linux实现类

public class LinuxImp extends ImageImp {
    @Override
    public void doPaint(Matrix matrix) {
        System.out.println("调用Linux系统的算法绘制像素矩阵："+matrix.getFileName());
    }
}

演示类

public class Demo {
    public static void main(String[] args) {
        Image image1 = new BMP();
        ImageImp imageImp1 = new WinImp();
        image1.setImp(imageImp1);
        image1.parseFile("demo.bmp");
    }
}

演示结果