汉诺塔java代码注释

import javax.swing.*; import java.awt.*; import java.awt.event.*; public class HannoiWindow extends JFrame implements ActionListener{ Tower tower=null; int amountOfDisc=3; char []towerName={'A','B','C'}; JMenuBar bar; JMenu menuGrade; JMenuItem oneGradeItem,twoGradeItem,threeGradeItem; JButton renew=null; JButton autoButton=null; JPanel center=new JPanel(); HannoiWindow(){ tower=new Tower(towerName); tower.setAmountOfDisc(amountOfDisc); tower.setMaxDiscWidth(120); tower.setMinDiscWidth(50); tower.setDiscHeight(16); tower.putDiscOnTower(); add(tower,BorderLayout.CENTER); bar=new JMenuBar(); menuGrade=new JMenu("选择级别"); oneGradeItem=new JMenuItem("初级"); twoGradeItem=new JMenuItem("中级"); threeGradeItem=new JMenuItem("高级"); menuGrade.add(oneGradeItem); menuGrade.add(twoGradeItem); menuGrade.add(threeGradeItem); bar.add(menuGrade); setJMenuBar(bar); oneGradeItem.addActionListener(this); twoGradeItem.addActionListener(this); threeGradeItem.addActionListener(this); renew=new JButton("重新开始"); renew.addActionListener(this); autoButton=new JButton("自动演示"); autoButton.addActionListener(this); JPanel north=new JPanel(); north.add(renew); north.add(autoButton); String mess="将全部盘子从"+towerName[0]+"座搬运到"+towerName[1]+ "座或"+towerName[2]+"座"; JLabel hintMess=new JLabel(mess,JLabel.CENTER); north.add(hintMess); add(north,BorderLayout.NORTH); setResizable(false); setVisible(true); setBounds(60,60,460,410); validate(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void actionPerformed(ActionEvent e){ if(e.getSource()==oneGradeItem){ amountOfDisc=3; tower.setAmountOfDisc(amountOfDisc); tower.putDiscOnTower(); } else if(e.getSource()==twoGradeItem){ amountOfDisc=4; tower.setAmountOfDisc(amountOfDisc); tower.putDiscOnTower(); } else if(e.getSource()==threeGradeItem){ amountOfDisc=5; tower.setAmountOfDisc(amountOfDisc); tower.putDiscOnTower(); } else if(e.getSource()==renew){ tower.setAmountOfDisc(amountOfDisc); tower.putDiscOnTower(); } else if(e.getSource()==autoButton){ tower.setAmountOfDisc(amountOfDisc); tower.putDiscOnTower(); int x=this.getBounds().x+this.getBounds().width; int y=this.getBounds().y; tower.getAutoMoveDisc().setLocation(x,y); tower.getAutoMoveDisc().setSize(280,this.getBounds().height); tower.getAutoMoveDisc().setVisible(true); } validate(); } public static void main(String args[]){ new HannoiWindow(); } }