Io Stream Practice 4--Keyboard Input student performance information, sorted into text

Demand:

Keyboard Input 5 Student information (name, language score, Math score, English score), according to the total score from high to low deposit text file

Analysis:
A: Create Student class
B: Create a Collection Object
Treeset<student>
C: Keyboard entry Student Information store to collection
D: Iterate through the collection and write the data to a text file

First create a student class

1  Packagezl_test;2 /**3 * It's a record of students ' grades4  * @authorLZL5  *6  */7  Public classStudent {8     PrivateString name;9     Private intChinese;Ten     Private intMath; One     Private int中文版; A      -      -      PublicStudent () { the         Super(); -         //TODO auto-generated Constructor stub -     } -  +  -      PublicStudent (String name,intChinese,intMathint中文版) { +         Super(); A          This. Name =name; at          This. Chinese =Chinese; -          This. Math =Math; -          This. 中文版 =中文版; -     } -  -  in      PublicString GetName () { -         returnname; to     } +  -  the      Public voidsetName (String name) { *          This. Name =name; $     }Panax Notoginseng  -  the      Public intGetchinese () { +         returnChinese; A     } the  +  -      Public voidSetchinese (intChinese) { $          This. Chinese =Chinese; $     } -  -  the      Public intGetmath () { -         returnMath;Wuyi     } the  -  Wu      Public voidSetmath (intmath) { -          This. Math =Math; About     } $  -  -      Public intGetenglish () { -         return中文版; A     } +  the  -      Public voidSetenglish (int中文版) { $          This. 中文版 =中文版; the     } the      the      Public intgetsum () { the          return  This. Chinese + This. 中文版 + This. Math; -          in  the     } the      About}

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Specific implementation classes:

1  Packagezl_test;2 3 ImportJava.io.BufferedWriter;4 ImportJava.io.FileWriter;5 Importjava.io.IOException;6 ImportJava.util.Comparator;7 ImportJava.util.Scanner;8 ImportJava.util.TreeSet;9 Ten  Public classStudentdemo { One  A      Public Static voidMain (string[] args)throwsIOException { -         //To create a collection object -treeset<student> ts =NewTreeset<student> (NewComparator<student>() { the             //Comparator -              Public intCompare (Student s1, Student S2) { -  -                 intNUM1 = S2.getsum ()-s1.getsum (); +                 intnum2 = NUM1 = = 0? S2.getchinese ()-S1.getchinese (): NUM1; -                 intnum3 = Num2 = = 0? S2.getmath ()-S1.getmath (): num2; +                 intNUM4 = Num3 = = 0?s2.getname (). CompareTo (S1.getname ()) A : num3; at                 returnnum4; -  -             } -         }); -  -         //Keyboard entry Student Information in          for(intx = 0; x < 5; X + +) { -Scanner sc =NewScanner (system.in); to  +System.out.println ("Please enter student's name:"); -String name =sc.nextline (); theSYSTEM.OUT.PRINTLN ("Please input language score"); *             intChinese =sc.nextint (); $System.out.println ("Please enter math score");Panax Notoginseng             intMath =sc.nextint (); -SYSTEM.OUT.PRINTLN ("Please input English score"); the             int中文版 =sc.nextint (); +  A             //create student object, call student class theStudent s =NewStudent (); + s.setname (name); - S.setchinese (Chinese); $ S.setmath (math); $ s.setenglish (中文版); -  -             //add information to the collection the Ts.add (s); -         }Wuyi  the         //text Open information that can be read, with buffer character stream -         //To create a buffered character output stream object WuBufferedWriter BW =NewBufferedWriter (NewFileWriter ("Student.txt")); -         //write the contents of the text first AboutBw.write ("Student performance record"); $ bw.newline (); - Bw.flush (); -Bw.write ("Language score" + "T" + "Math Score" + "T" + "English Score"); - bw.newline (); A Bw.flush (); +  the         //iterate through the collection and add the resulting data to the file -          for(Student student:ts) { $             //stitching on the information obtained theStringBuilder SB =NewStringBuilder (); theSb.append (Student.getname () + "\t\t") the. Append (Student.getchinese () + "\t\t") the. Append (Student.getmath () + "\t\t") - . Append (Student.getenglish ()); in Bw.write (sb.tostring ()); the bw.newline (); the         } About bw.close (); theSYSTEM.OUT.PRINTLN ("Student scores are stored"); the     } the}

Io Stream Practice 4--Keyboard Input student performance information, sorted into text