//書籍管理系統,made by liwei...
import java.io.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Dialog;


public class BookManagement implements ActionListener
{
     Frame f;
     CardLayout myCard;
     Panel p1,p2,p3,p4;
     TextField name,num,press,price,store,dnum,sname,snum,zname,zoff,zshow;
     Button b1,b2,db1,db2,sb1,sb2,sb3,sb4,zb1,zb2;
     Label xinxi,dxinxi;
     TextArea sxinxi;
     
     static HashMap bookname= new HashMap();
     static HashMap bookpublisher= new HashMap();
     static HashMap bookprice= new HashMap();
     static HashMap bookstock= new HashMap();





     public static void main(String args[])
     {

         BookManagement app=new BookManagement();
         app.init();

     }
       





       public void init()
     {
         f=new Frame("書籍信息管理");       
         myCard=new CardLayout();
         f.setLayout(myCard);
         p1=new Panel();
         p2=new Panel();
         p3=new Panel();
         p4=new Panel();
         p1.setBackground(Color.yellow);
         p2.setBackground(Color.green);
         p3.setBackground(Color.blue);
         p4.setBackground(Color.pink);
         f.add(p1,"First");
         f.add(p2,"Second");
         f.add(p3,"Third");
         f.add(p4,"Fourth");
         myCard.show(f,"First");



         MenuBar menu=new MenuBar();
         Menu m1=new Menu("操作選項"); 
         MenuItem a1=new MenuItem("輸入");
         MenuItem a2=new MenuItem("刪除");
         MenuItem a3=new MenuItem("查詢");
         MenuItem a4=new MenuItem("折扣");
         menu.add(m1);
         m1.add(a1);
         m1.addSeparator(); 
         m1.add(a2);
         m1.addSeparator(); 
         m1.add(a3);
         m1.addSeparator(); 
         m1.add(a4);
         f.setMenuBar(menu);
         a1.addActionListener(this);
         a2.addActionListener(this);
         a3.addActionListener(this);
         a4.addActionListener(this);

//panel頁面設計
         Label name1=new Label("請輸入書名");
         name=new TextField(10);
         Label num1=new Label("請輸入書號");
         num=new TextField(10);
         Label press1=new Label("請輸入出版社名稱");
         press=new TextField(10);
         Label price1=new Label("請輸入價格");
         price=new TextField(10);
         Label store1=new Label("請輸入存儲量");
         store=new TextField(10);
         b1=new Button("錄入");
         b2=new Button("重置");
         xinxi=new Label(                    );
         Label blank1=new Label(                    );
         Label blank2=new Label(                    );
         Label blank3=new Label(                    );
         Label blank4=new Label(                    );
         Label blank5=new Label(                    );

         Box box1=Box.createHorizontalBox();
         box1.add(name1);
         box1.add(name);
         Box box2=Box.createHorizontalBox();
         box2.add(num1);
         box2.add(num);
         Box box3=Box.createHorizontalBox();
         box3.add(press1);
         box3.add(press);
         Box box4=Box.createHorizontalBox();
         box4.add(price1);
         box4.add(price);
         Box box5=Box.createHorizontalBox();
         box5.add(store1);
         box5.add(store);
         Box box6=Box.createHorizontalBox();
         box6.add(b1);
         box6.add(b2);
         Box box7=Box.createHorizontalBox();
         box7.add(xinxi);
         Box box8=Box.createHorizontalBox();
         box8.add(blank1);
         Box box9=Box.createHorizontalBox();
         box9.add(blank2);
         Box box10=Box.createHorizontalBox();
         box10.add(blank3);
         Box box11=Box.createHorizontalBox();
         box11.add(blank4);
         Box box12=Box.createHorizontalBox();
         box12.add(blank5);

         Box boxH=Box.createVerticalBox();
         boxH.add(box1);
         boxH.add(box8);
         boxH.add(box2);
         boxH.add(box9);
         boxH.add(box3);
         boxH.add(box10);
         boxH.add(box4);
         boxH.add(box11);
         boxH.add(box5);
         boxH.add(box12);
         boxH.add(box6);
         boxH.add(box7);

         b1.addActionListener(this);
         b2.addActionListener(this);

         p1.add(boxH);



//panel2頁面設計
         Label name2=new Label("請輸入書號");
         dnum=new TextField(10);
         db1=new Button("刪除");
         db2=new Button("重置");
         dxinxi=new Label(                    );
         Label dblank1=new Label(                    );

         Box boxd1=Box.createHorizontalBox();
         boxd1.add(name2);
         boxd1.add(dnum);
         Box boxd2=Box.createHorizontalBox();
         boxd2.add(dblank1);
         Box boxd3=Box.createHorizontalBox();
         boxd2.add(db1);
         boxd2.add(db2);
         Box boxd4=Box.createHorizontalBox();
         boxd4.add(dxinxi);
         
         Box boxdH=Box.createVerticalBox();
         boxdH.add(boxd1);
         boxdH.add(boxd2);
         boxdH.add(boxd3);
         boxdH.add(boxd4);

         db1.addActionListener(this);
         db2.addActionListener(this);


         p2.add(boxdH);




//panel3頁面設計
         Label title1=new Label("查詢信息系統");
         Label title2=new Label("請輸入要查詢的書籍書名");
         sname=new TextField(10);
         Label title3=new Label("請輸入要查詢的書籍書號");
         snum=new TextField(10);
         Label title4=new Label("所查詢的書籍相關信息");
         sxinxi=new TextArea(10,1);
         Label blanks1=new Label(                    );
         sb1=new Button("查詢");
         sb2=new Button("重置");
     

         Box boxs1=Box.createHorizontalBox();
         boxs1.add(title1);
         Box boxs2=Box.createHorizontalBox();
         boxs2.add(title2);
         boxs2.add(sname);
         Box boxs3=Box.createHorizontalBox();
         boxs3.add(title3);
         boxs3.add(snum);
         Box boxs4=Box.createHorizontalBox();
         boxs4.add(title4);
         Box boxs5=Box.createHorizontalBox();
         boxs5.add(sxinxi);
         Box boxs6=Box.createHorizontalBox();
         boxs6.add(sb1);
         boxs6.add(sb2);
         Box boxs8=Box.createHorizontalBox();
         boxs8.add(blanks1);


         Box boxsH=Box.createVerticalBox();
         boxsH.add(boxs1);
         boxsH.add(boxs2);
         boxsH.add(boxs3);
         boxsH.add(boxs4);
         boxsH.add(boxs5);
         boxsH.add(boxs8); 
         boxsH.add(boxs6); 

         p3.add(boxsH);

         sb1.addActionListener(this);
         sb2.addActionListener(this);   


    

//panel4頁面設計
         Label titlez1=new Label("書價計算器");
         Label titlez3=new Label("請輸入要計算價錢的書籍名");
         zname=new TextField(10);
         Label titlez2=new Label("請輸入折扣,例如70,80,90");
         zoff=new TextField(20);
         zb1=new Button("計算");
         zb2=new Button("重置");
         zshow=new TextField(10);
     

         Box boxz1=Box.createHorizontalBox();
         boxz1.add(titlez1);
         Box boxz2=Box.createHorizontalBox();
         boxz2.add(titlez2);
         boxz2.add(zoff);
         Box boxz3=Box.createHorizontalBox();
         boxz3.add(zb1);
         boxz3.add(zb2);
         Box boxz4=Box.createHorizontalBox();
         boxz4.add(zshow);
         Box boxz5=Box.createHorizontalBox();
         boxz5.add(titlez3);
         boxz5.add(zname);

         Box boxzH=Box.createVerticalBox();
         boxzH.add(boxz1);
         boxzH.add(boxz5);
         boxzH.add(boxz2);
         boxzH.add(boxz3);
         boxzH.add(boxz4);

         zb1.addActionListener(this);
         zb2.addActionListener(this);    

         p4.add(boxzH);




//frame相關參數設置
         f.setSize(500,390);
         f.show(); 




//用適配器方法實現窗口關閉
  f.addWindowListener(new WindowAdapter(){
   public void windowClosing(WindowEvent e)
     {System.exit(0);}
  });
     }




//事件處理
  public void actionPerformed(ActionEvent e)
     {
     //實現菜單事件

        if(e.getActionCommand()=="輸入")
           myCard.show(f,"First");
        if(e.getActionCommand()=="刪除")
           myCard.show(f,"Second");
        if(e.getActionCommand()=="查詢")
           myCard.show(f,"Third");
        if(e.getActionCommand()=="折扣")
           myCard.show(f,"Fourth");


//panel1 面板按鈕事件處理 
        if(e.getSource()==b1)
          {   xinxi.setText("錄入成功"); 
              go();                          }
        if(e.getSource()==b2)
          {  name.setText(""); 
              num.setText("");
              press.setText("");
              price.setText("");
              store.setText("");             }


//panel2 面板按鈕事件處理 
        if(e.getSource()==db1)
          {   dxinxi.setText("刪除成功");
              in();                          }
        if(e.getSource()==db2)
          {  dnum.setText("");              }         


//panel3 面板按鈕事件處理 
        if(e.getSource()==sb1)
          {   out();                         }
        if(e.getSource()==sb2)
          {  sname.setText(""); 
              snum.setText(""); 
              sxinxi.setText("");            }


//panel4 面板按鈕事件處理 
        if(e.getSource()==zb1)
          {
              String s9=zname.getText();
	      Iterator itname = bookname.keySet().iterator();
              while(itname.hasNext())
                {
			Object key= itname.next(); 
			if(bookname.get(key).equals(s9))
                        {
		          int x = Integer.parseInt(bookprice.get(key).toString());
                          String s10=zoff.getText();
                          float y=100;
                          y=Integer.parseInt(s10);
                          float z=x*y/100;
                          zshow.setText("原價為: "+x+",折扣后,價錢為: "+z);
                        }
                 }
          }
     

        if(e.getSource()==zb2)
           {  zname.setText("");
              zoff.setText(""); 
              zshow.setText("");            }    


     
    }
      

  


//go方法
 public void go()             
       {
                String s1=name.getText();
                String s2=num.getText();
                String s3=press.getText();
                String s4=price.getText();
                String s5=store.getText();
                bookname.put(s2, s1);
		bookpublisher.put(s2, s3);
		bookprice.put(s2, s4);
		bookstock.put(s2, s5);
       }




//in方法
public void in()
        {
                String s6=dnum.getText();                
		bookname.remove(s6);
		bookpublisher.remove(s6);
		bookprice.remove(s6);
		bookprice.remove(s6);
   
        }



//out方法
public void out()
        {
                String s7=sname.getText();
		Iterator itname = bookname.keySet().iterator();
                while(itname.hasNext())
                {
			Object key= itname.next(); 
			if(bookname.get(key).equals(s7))
                        {
		          int x = Integer.parseInt(bookprice.get(key).toString());
		          int a = Integer.parseInt(bookstock.get(key).toString());
                         //int z=x*y/100;
                          sxinxi.setText("書名:"+bookname.get(key)+'\n'+"---書號:"+key+'\n'+"---出版社:"+bookpublisher.get(key)+'\n'+"---單價:"+x+'\n'+"---庫存:"+a+'\n');   
                          if(a<5)
                              sxinxi.append("庫存小于5，請趕快進貨");  
                         }
			if(!(bookname.get(key).equals(s7)))
                            sxinxi.setText("沒有你要查找的書籍信息");
                }



                String s8=snum.getText();
		int x = Integer.parseInt(bookprice.get(s8).toString());
                int a = Integer.parseInt(bookstock.get(s8).toString());
                sxinxi.setText("書名:"+bookname.get(s8)+'\n'+"---書號:"+s8+'\n'+"---出版社:"+bookpublisher.get(s8)+'\n'+"---單價:"+x+'\n'+"---庫存:"+bookstock.get(s8)+'\n');
                if(a<5)
                     sxinxi.append("庫存小于5，請趕快進貨");                              
                


        }

}