java生成器模式
UML图：
??? 产品：
??? PanelProduct.java
package Builder;import javax.swing.*;public class PanelProduct extends JPanel { JButton button; JLabel label; JTextField textField;}??? 抽象生成器：
??? Builder.java
import javax.swing.JPanel;//抽象生成器public interface Builder { public abstract void buildButton(); public abstract void buildLable(); public abstract void buildTextField(); public abstract JPanel getPanel();}?? 具体生成器：
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package Builder;import javax.swing.*;public class ConcreteBuilderOne implements Builder { private PanelProduct panel; ConcreteBuilderOne() { panel = new PanelProduct(); } @Override public void buildButton() { panel.button = new JButton("按钮"); } @Override public void buildLable() { panel.label = new JLabel("标签"); } @Override public void buildTextField() { panel.textField = new JTextField("文本框"); } @Override public JPanel getPanel() { panel.add(panel.button); panel.add(panel.label); panel.add(panel.textField); return panel; }}package Builder;import javax.swing.*;public class ConcreteBuilderTwo implements Builder { private PanelProduct pannel;//需要具体容器 public ConcreteBuilderTwo() { pannel=new PanelProduct(); } @Override public void buildButton() { pannel.button=new JButton("button"); } @Override public void buildLable() { pannel.label=new JLabel("label"); } @Override public void buildTextField() { pannel.textField=new JTextField("textField"); } @Override public JPanel getPanel() { pannel.add(pannel.textField); pannel.add(pannel.label); pannel.add(pannel.button); return pannel; }}??? 指挥者：
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package Builder;import javax.swing.JPanel;//指挥者public class Director { private Builder builder; public Director(Builder builder) { this.builder = builder; } public JPanel constructProduct() { builder.buildButton(); builder.buildLable(); builder.buildTextField(); JPanel product = builder.getPanel(); return product; }}??? 模式使用：
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package Builder;import javax.swing.*;public class Application { public static void main(String[] args) { Builder builder = new ConcreteBuilderOne(); Director director = new Director(builder); JPanel panel = director.constructProduct(); JFrame frameOne = new JFrame(); frameOne.add(panel); frameOne.setBounds(12, 12, 200, 120); frameOne.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frameOne.setVisible(true); builder = new ConcreteBuilderTwo(); director = new Director(builder); panel = director.constructProduct(); frameOne = new JFrame(); frameOne.add(panel); frameOne.setBounds(212, 12, 200, 120); frameOne.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frameOne.setVisible(true); }}??