search.java

交通灯多线程

// Tutorialsearch.java
import javax.swing.*;
import java.awt.*;import java.awt.event.*;
 class MyFrame extends JFrame implements ItemListener
 { // JLabel and JTextField for bookname
   String value;//这一属性是当前显示图书的价值范围
   private JLabel booknameJLabel;
   private JTextField booknameJTextField;

   // JLabel and JTextField for author
   private JLabel authorJLabel;
   private JTextField authorJTextField;
   //JLabel for value arrange
   private JLabel valueJLabel;
     
    //JButton for search 
   private JButton searchJButton;
   //选择下拉菜单
   Choice valuechooser;
    //创建2 dimension array，并且初始化数组为50人以上
   String BookArray[][]={{"天","王三","1-20"},{"地","王一","20-40"},{"收","王把","1-20"},{"是i","王咽","40-60"},{"好","里三","1-20"},{"一天","王大三","1-20"},{"耳天","其三","1-20"},{"巴","六三","1-20"},{"说","及三","1-20"},{"深","王小三","1-20"},{"大天","王三网","1-20"},{"想","王四三","1-20"},{"额天","王三啊","1-20"},{"天是","王的数三","1-20"},{"啊天","王三天","1-20"},{"天我","王三","1-20"},{"天1","王三","1-20"},{"天2","王三","1-20"},{"天3","王三","1-20"},{"天4","王三","1-20"},{"天5","王三","1-20"},{"天6","王三","1-20"},{"天7","王三","1-20"},{"天8","王三","1-20"},{"天9","王三","1-20"},{"天10","王三","1-20"},{"天11","王三","1-20"},{"天12","王三","1-20"},{"天13","王三","1-20"},{"天14","王三","1-20"},{"天15","王三","1-20"},{"天16","王三","1-20"},{"天17","王三","1-20"},{"天18","王三","1-20"},{"天19","王三","1-20"},{"天20","王三","1-20"},{"天21","王三","1-20"},{"天22","王三","1-20"},{"天23","王三","1-20"},{"天26","王三","1-20"},{"天56","王三","1-20"},{"天90","王三","1-20"},{"34天","王三","1-20"},{"天57","王三","1-20"},{"天12","王三","1-20"},{"天111","王三","1-20"},{"天122","王三","1-20"},{"323天","王三","1-20"},{"天434","王三","1-20"},{"234天","王三","1-20"},{"43天","王三","1-20"},{"656天","王三","1-20"}};

   //TextArea，用来输出search的结果
      private JTextArea ResultJTextArea;
   
    // no-argument constructor
   MyFrame(String s)
    {  super(s);
       // create and position GUI components; register event handlers
      // get content pane and set layout to null
      Container contentPane = getContentPane();
      contentPane.setLayout( null ); 

      // set up booknameJLabel
      booknameJLabel = new JLabel();
      booknameJLabel.setText( "图书名:" );
     booknameJLabel.setBounds( 16, 16, 130, 21 );
      contentPane.add( booknameJLabel );

      // set up authorJLabel
      authorJLabel = new JLabel();
      authorJLabel.setText( "作者:" );
     authorJLabel.setBounds( 16, 48, 104, 21 );
     contentPane.add( authorJLabel );

      // set up valueJLabel
      valueJLabel = new JLabel();
      valueJLabel.setText( "价格范围:" );
      valueJLabel.setBounds( 204, 16, 40, 21 );
      contentPane.add( valueJLabel );

      // set up booknameJTextField
      booknameJTextField = new JTextField();
      booknameJTextField.setText( "" );
      booknameJTextField.setBounds( 148, 16, 40, 21 );
      booknameJTextField.setHorizontalAlignment( JTextField.RIGHT );
      contentPane.add( booknameJTextField );

      // set up authorJTextField
      authorJTextField = new JTextField();
      authorJTextField.setText( "" );
      authorJTextField.setBounds( 148, 48, 40, 21 );
      authorJTextField.setHorizontalAlignment( JTextField.RIGHT );
      contentPane.add( authorJTextField );

      // set up ResultJTextField
      valuechooser=new Choice();
      valuechooser.addItem("");
      valuechooser.addItem("1-20");   
      valuechooser.addItem("20-40"); 
      valuechooser.addItem("40-60"); 
      valuechooser.setBounds( 244, 16, 86, 21 );
      contentPane.add( valuechooser);
      valuechooser.addItemListener(this);//addItemListener


 
      // set up searchJButton
      searchJButton = new JButton();
      searchJButton.setText( "查询" );
      searchJButton.setBounds( 204, 48, 126, 24 );
      contentPane.add( searchJButton );
      searchJButton.addActionListener(

         new ActionListener() // anonymous inner class
         {
            // method called when search JButton is pressed
            public void actionPerformed( ActionEvent event )
            { 
		    searchJButtonActionPerformed( event );
            }
         } // end anonymous inner class
      ); // end call to addActionListener
      
      //set up ResultJTextArea
      ResultJTextArea = new JTextArea();
      ResultJTextArea.setEditable(false);
      JScrollPane scrollJScrollPane =new JScrollPane( ResultJTextArea );
      scrollJScrollPane.setBounds( 16, 72, 318, 50 );
      add( scrollJScrollPane );//添加滚动条
      
      
      setSize( 354, 200 );     // set window size
      setVisible( true );      // display window
  
    } 
  
   // search the value author or bookname 
   private void searchJButtonActionPerformed( ActionEvent event)
   {
     
     int k=0;
     String bookname,author;
     String text="";
     bookname=booknameJTextField.getText();
     author=authorJTextField.getText();
     
      //    创建另外的数组用来存储结果，并初始化
      String result[]={"","","","","",""," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," ","","","","","","","","","","","","","",""};
      for(int i=0;i<BookArray.length;i++)
      {if(BookArray[i][0].equals(bookname)||BookArray[i][1].equals(author)||BookArray[i][2].equals(this.value))
	      {
	       result[k]="bookname:"+BookArray[i][0]+" author:"+BookArray[i][1]+" value:"+BookArray[i][2]+"\n";k++;
	      }
      }
      // display result in the text field
      for(int j=0;j<k;j++){text=text+result[j];}
       ResultJTextArea.setText(text);
   } // end method searchJButtonActionPerformed*/

   
    public void itemStateChanged(ItemEvent e)
    {   
	    this.value=valuechooser.getSelectedItem();
    }
 }
 public class search
 {  public static void main(String args[])
    {MyFrame application=new MyFrame("图书查询系统");
     application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );//关闭窗口
    } 
 }