A collection framework for Java Fundamentals Enhancement Note 49: Keyboard input 5 Student information (name, language score, Math score, English score), according to the total score from high to low output to the console

1. Keyboard Input 5 Student information (name, language score, Math score, English score), according to the total score from high to low output to the console:

Analysis:
　　 A: Define Student Class
B: Create a TreeSet collection
C: How to achieve the total score from high?
D: Keyboard input 5 Student information
E: Traversing the TreeSet collection

2. code example:

(1)Student. Java:

1  Packagecn.itcast_08;2 3  Public classStudent {4     //name5     PrivateString name;6     //Language Achievement7     Private intChinese;8     //Math scores9     Private intMath;Ten     //English score One     Private int中文版; A  -      PublicStudent (String name,intChinese,intMathint中文版) { -         Super(); the          This. Name =name; -          This. Chinese =Chinese; -          This. Math =Math; -          This. 中文版 =中文版; +     } -  +      PublicStudent () { A         Super(); at     } -  -      PublicString GetName () { -         returnname; -     } -  in      Public voidsetName (String name) { -          This. Name =name; to     } +  -      Public intGetchinese () { the         returnChinese; *     } $ Panax Notoginseng      Public voidSetchinese (intChinese) { -          This. Chinese =Chinese; the     } +  A      Public intGetmath () { the         returnMath; +     } -  $      Public voidSetmath (intmath) { $          This. Math =Math; -     } -  the      Public intGetenglish () { -         return中文版;Wuyi     } the  -      Public voidSetenglish (int中文版) { Wu          This. 中文版 =中文版; -     } About  $      Public intgetsum () { -         return  This. Chinese + This. Math + This. 中文版; -     } -}

(2)Treesetdemo. Java:

1  Packagecn.itcast_08;2 3 ImportJava.util.Comparator;4 ImportJava.util.Scanner;5 ImportJava.util.TreeSet;6 7 /*8 * Keyboard Input 5 Student information (name, language score, Math score, English score), according to the total score from high to low output to the console9  * Ten * Analysis: One * A: Define Student class A * B: Create a TreeSet collection - * C: How to achieve the total score from high?  - * D: Keyboard input 5 Student information the * E: Traverse TreeSet Collection -  */ -  Public classTreesetdemo { -      Public Static voidMain (string[] args) { +         //Create a TreeSet collection -treeset<student> ts =NewTreeset<student> (NewComparator<student>() { + @Override A              Public intCompare (Student s1, Student S2) { at                 //total score from high to low -                 intnum = S2.getsum ()-s1.getsum (); -                 //the same total score is not necessarily the same language -                 intnum2 = num = = 0? S1.getchinese ()-S2.getchinese (): num; -                 //the same score is not necessarily the same math -                 intnum3 = Num2 = = 0? S1.getmath ()-S2.getmath (): num2; in                 //the same total score is not necessarily the same English -                 intNUM4 = Num3 = = 0? S1.getenglish ()-s2.getenglish (): num3; to                 //names aren't necessarily the same. +                 intNUM5 = Num4 = = 0?s1.getname (). CompareTo (S2.getname ()) - : num4; the                 returnNUM5; *             } $         });Panax Notoginseng  -System.out.println ("Start of Student information entry"); the         //Keyboard Input 5 Student information +          for(intx = 1; x <= 5; X + +) { AScanner sc =NewScanner (system.in); theSystem.out.println ("Please enter the" + x + "Student's name:"); +String name =sc.nextline (); -System.out.println ("Please enter the" + x + "Student's language score:"); $String chinesestring =sc.nextline (); $System.out.println ("Please enter" + x + "Student's math Score:"); -String mathstring =sc.nextline (); -System.out.println ("Please enter the" + x + "student's English Score:"); theString englishstring =sc.nextline (); - Wuyi             //encapsulate data into student objects theStudent s =NewStudent (); - s.setname (name); Wu S.setchinese (Integer.parseint (chinesestring)); - S.setmath (Integer.parseint (mathstring)); About s.setenglish (Integer.parseint (englishstring)); $  -             //add student objects to the collection - Ts.add (s); -         } ASYSTEM.OUT.PRINTLN ("Student Information Entry Complete"); +  theSystem.out.println ("The learning information is sorted from high to low as follows:"); -System.out.println ("name \ t Chinese result \ t Math score \ t English score"); $         //iterating through the collection the          for(Student s:ts) { theSystem.out.println (S.getname () + "\ T" + s.getchinese () + "\ T" the+ S.getmath () + "\ T" +s.getenglish ()); the         } -     } in}

Run the effect as follows:

A collection framework for Java Fundamentals Enhancement Note 49: Keyboard input 5 Student information (name, language score, Math score, English score), according to the total score from high to low output to the console