Java工厂模式定义与用法实例分析

// 抽象产品interface Block {  public void print();}// 具体产品class IBlock implements Block {  @Override  public void print() {    System.out.println("我是一个I形的方块！");  }}// 具体产品class LBlock implements Block {  @Override  public void print() {    System.out.println("我是一个L形的方块！");  }}// 抽象工厂interface Factory {  public Block getInstance();}// 具体工厂class IBlockFactory implements Factory {  @Override  public Block getInstance() {    return new IBlock();  }}// 具体工厂class LBlockFactory implements Factory {  @Override  public Block getInstance() {    return new LBlock();  }}// 客户端public class TestAdvancedFactory {  public static void main( String[] args ) {    // 创建一个生产 I 形方块的工厂    Factory iBlockFactory = new IBlockFactory();    // 用工厂生产一个 I 形方块    Block iBlock = iBlockFactory.getInstance();    iBlock.print();    // 创建一个生产 L 形方块的工厂    Factory LBlockFactory = new LBlockFactory();    // 用工厂生产一个 L 形方块    Block lBlock = LBlockFactory.getInstance();    lBlock.print();  }}