IO Stream + database after class exercises

1, read the test paper and then do the problem calculation points

File file1=NewFile ("D:\\file", "test.txt"); Try{FileReader in1=NewFileReader (FILE1); BufferedReader in2=NewBufferedReader (in1);            String s; intCount=0;  for(;(s=in2.readline ())! =NULL;){                if(!s.startswith ("-") {System.out.println (s); }                Else{System.out.print ("Input your Answer:"); S=s.replaceall ("-", "" ");                    String Daan; Scanner Scanner1=NewScanner (system.in); Daan=Scanner1.next (); if(S.equals (Daan)) {count++; }}} System.out.println ("Point" +count); }        Catch(Exception e) {System.out.println (E.getmessage ()); }    

2, use card layout to do two pages, to input and output

 PackageTestwin;ImportJava.awt.EventQueue;Importjava.awt.event.ActionEvent;ImportJava.awt.event.ActionListener;ImportJava.io.*;ImportJavax.swing.JFrame;ImportJavax.swing.JPanel;ImportJavax.swing.JTextArea;ImportJavax.swing.JMenuBar;ImportJavax.swing.JMenu;ImportJavax.swing.JMenuItem;Importjava.awt.CardLayout; Public classTestwinImplementsActionListener {//using a card layout, call two pages from the menu bar    PrivateJFrame frame;    File File1; JMenuItem input=NewJMenuItem ("Input"); JMenuItem Show=NewJMenuItem ("Show");    Inputarea InputMessage;    CardLayout Card;    JPanel Panel;    JTextArea TextArea; /*** Launch the application. */     Public Static voidMain (string[] args) {Eventqueue.invokelater (NewRunnable () { Public voidrun () {Try{Testwin window=NewTestwin (); Window.frame.setVisible (true); } Catch(Exception e) {e.printstacktrace ();    }            }        }); }    /*** Create the application. */     PublicTestwin () {initialize (); }    /*** Initialize The contents of the frame. */    Private voidInitialize () {file1=NewFile ("D:\\file", "test.txt"); Frame=NewJFrame (); Frame.setbounds (100, 100, 450, 300);                Frame.setdefaultcloseoperation (Jframe.exit_on_close); JMenuBar MenuBar=NewJMenuBar ();                Frame.setjmenubar (MenuBar); JMenu Menu=NewJMenu ("\u83dc\u5355");                Menubar.add (menu);                Menu.add (input);                Menu.add (show); Input.addactionlistener ( This); Show.addactionlistener ( This); TextArea=NewJTextArea (12,50); InputMessage=NewInputarea (FILE1); Card=Newcardlayout (); Panel=NewJPanel ();        Panel.setlayout (card); Panel.add ("Input", InputMessage); Panel.add ("Show", TextArea);    Frame.add (panel); } @Override Public voidactionperformed (ActionEvent e) {//TODO Auto-generated method stubs        if(E.getsource () = =input) {card.show (panel,"Input"); }        Else if(E.getsource () = =show) {            intNumber=1; Textarea.settext (NULL); Card.show (panel,"Show"); Try{randomaccessfile in=NewRandomaccessfile (File1, "R"); String name=NULL;  for(;(Name=in.readutf ())! =NULL;) {textarea.append ("\ n" + "Name:" +name); Textarea.append ("\ T" +In.readutf ()); Textarea.append ("\ T" +In.readutf ()); Textarea.append ("\ n----------------------------------------------------------------------------"); number++;            } in.close (); }            Catch(Exception E1) {System.out.println (E1.getmessage ()); System.out.println ("2222"); }        }    }}

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 PackageTestwin;ImportJavax.swing.JPanel;ImportJava.awt.Color;Importjava.awt.event.ActionEvent;ImportJava.awt.event.ActionListener;ImportJava.io.*;Importjavax.swing.*;Importjavax.swing.BoxLayout;ImportJavax.swing.JLabel; Public classInputareaextendsJPanelImplementsactionlistener{/*** Create the panel. */File file1; Randomaccessfile out1;//Use a box layout and then enter the file with a random streamBox Basebox,box1,box2;    JButton button1; PrivateJLabel Lblnewlabel; PrivateJLabel Lblnewlabel_1; PrivateJLabel lblnewlabel_2; PrivateJLabel Lblnewlabel_3; PrivateJTextField Text1; PrivateJTextField Text2; PrivateJTextField Text3; PrivateJButton button;  PublicInputarea (File f) {setforeground (Color.cyan);  This. file1=F; Basebox=Box.createhorizontalbox (); Box1=Box.createverticalbox (); Box2=Box.createverticalbox ();                Basebox.add (Box1); Lblnewlabel=NewJLabel ("\u8f93\u5165\u59d3\u540d");                Box1.add (Lblnewlabel); Lblnewlabel_1=NewJLabel ("\u8f93\u5165qq");                Box1.add (Lblnewlabel_1); Lblnewlabel_2=NewJLabel ("\U8F93\U5165\U7535\U8BDD");                Box1.add (lblnewlabel_2); Lblnewlabel_3=NewJLabel ("\u5355\u51fb\u5f55\u5165");        Box1.add (Lblnewlabel_3);                Basebox.add (BOX2); Text1=NewJTextField ();        Box2.add (Text1); Text1.setcolumns (10); Text2=NewJTextField ();        Box2.add (TEXT2); Text2.setcolumns (10); Text3=NewJTextField ();        Box2.add (TEXT3); Text3.setcolumns (10); Button=NewJButton ("\u5f55\u5165");        Box2.add (button);        Add (Basebox); Button.addactionlistener ( This); } @Override Public voidactionperformed (ActionEvent e) {//TODO Auto-generated method stubs        Try{randomaccessfile out1=NewRandomaccessfile (File1, "RW"); LongLength=file1.length ();            Out1.seek (length); Out1.writeutf ("Name:" +Text1.gettext ()); Out1.writeutf ("QQ:" +Text2.gettext ()); Out1.writeutf ("Phone:" +Text3.gettext ());            Out1.close (); Text1.settext (NULL); Text2.settext (NULL); Text3.settext (NULL); }        Catch(Exception E1) {System.out.println (E1.getmessage ()); }    }    }

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IO Stream + database after class exercises