Java Internship II

Linked list (Java implementation) Link.java

public class link{private Node first;    Public Link () {this.first = null;        }//Determine if NULL public boolean isEmpty () {if (This.first = = null) return true;    return false;        }//Insert head node public void Insertheadnode (int data) {node TMP = new Node (data);        if (This.first = = null) first = TMP;            else {Tmp.setnext (First.getnext ());                 First.setnext (TMP);    } return;        }//Insert Data node under index public void insertnode (int data, int index) {node p = this.first;        int cnt = 0;                        while (cnt! = index) {p = P.getnext ();        cnt++;        } node NewNode = new node (data);        Newnode.setnext (P.getnext ());        P.setnext (NewNode);        return;        }//delete the Head node public node Deleteheadnode () {node tmp = first;        This.first = Tmp.getnext ();    return TMP;   }//find the data in the link Public Node findNode (int data) {node p = this.first;            while (P! = null) {if (p.getdata () = = data) return p;            if (p = = null) break;        p = P.getnext ();    } return null;        }//display the link public void DisplayLink () {Node p = first;            while (P! = null) {System.out.println (P.getdata ());        p = P.getnext ();    } return; }   }

Node.java

public class Node{    private int data;    private Node next;      //construction    public Node(){        this.data = 0;        this.next = null;    }    public Node(int data){        this.data = data;        this.next = null;    }    //get     public Node getNext(){        return this.next;    }    public int getData(){        return data;    }        //set     public void setNext(Node next){        this.next = next;    }    public void setData(int data){        this.data = data;    }    //show     public void nodeDisplay(){        System.out.println("{"+data+"}");    }   }

Testofnode.java

public class testofnode{public static void Main (string[] args) {//test of node node TMP1 = new Node (100)        ;                Tmp1.nodedisplay ();        Link TMP2 = new link ();        Test of Insertheadnode & DisplayLink Tmp2.insertheadnode (00);        Tmp2.displaylink ();        Test of IsEmpty System.out.println (Tmp2.isempty ());        System.out.println ("+++++\n\n");        Test of Insertnode Tmp2.insertnode (11,0);        Tmp2.insertnode (22,1);        Tmp2.insertnode (33,2);        Tmp2.insertnode (44,3);        Tmp2.insertnode (55,4);        Tmp2.insertnode (66,5);        Tmp2.displaylink ();        Test of Delete the head Node System.out.println ("++++");        Tmp2.deleteheadnode ();        Tmp2.displaylink (); Test of Find the data if (Tmp2.findnode (3310)!=null) {System.out.println ("truely find the data:" + 3310        );        }else{System.out.println ("Fasle"); } System.out.println("++++++");        Test of Insertheadnode Tmp2.insertheadnode (1111);        Tmp2.insertheadnode (2222);        Tmp2.insertheadnode (3333);    Tmp2.displaylink (); }}

Sort-Country gold medal silver medal separately sorted Testofnode.java

public class testofnode{public static void Main (string[] args) {//test of node node TMP1 = new Node (100)        ;                Tmp1.nodedisplay ();        Link TMP2 = new link ();        Test of Insertheadnode & DisplayLink Tmp2.insertheadnode (00);        Tmp2.displaylink ();        Test of IsEmpty System.out.println (Tmp2.isempty ());        System.out.println ("+++++\n\n");        Test of Insertnode Tmp2.insertnode (11,0);        Tmp2.insertnode (22,1);        Tmp2.insertnode (33,2);        Tmp2.insertnode (44,3);        Tmp2.insertnode (55,4);        Tmp2.insertnode (66,5);        Tmp2.displaylink ();        Test of Delete the head Node System.out.println ("++++");        Tmp2.deleteheadnode ();        Tmp2.displaylink (); Test of Find the data if (Tmp2.findnode (3310)!=null) {System.out.println ("truely find the data:" + 3310        );        }else{System.out.println ("Fasle"); } System.out.println("++++++");        Test of Insertheadnode Tmp2.insertheadnode (1111);        Tmp2.insertheadnode (2222);        Tmp2.insertheadnode (3333);    Tmp2.displaylink (); }}

Test.java

import java.util.Arrays;public class Test{    public static void main(String[] args){        Country American = new Country(46,37,38);        Country English = new Country(27,23,17);        Country China = new Country(26,18,26);        Country Russia = new Country(19,18,19);        Country Germany = new Country(17,10,15);                                Country[] countrys = new Country[5];        countrys[0] = American;        countrys[1] = English;        countrys[2] = China;        countrys[3] = Russia;        countrys[4] = Germany;        Arrays.sort(countrys);        for(Country cty:countrys)            System.out.println(cty.gold + " " + cty.silver + " " + cty.copper + " " + cty.sum);            }}

Coffee Class-Object-oriented programming Coffee.java

Package coffee;//added method abstract class addimplement{private String name;    public void SetName (String name) {this.name = name;    } public String GetName () {return this.name; } public abstract void Add (); }class Addsugarimplement extends addimplement{public void Add () {System.out.println ("We have added the Sugar^_    ^"); }}class Addmilkimplement extends addimplement{public void Add () {System.out.println ("You have added the Milk ^_    ^");    }}//the implementation of the abstract classes public abstract class coffee{private addimplement Addimpl;    Then, in the call to add, the output public void Add () {addimpl.add ();    };    This setting function should be called first public void Setaddimpl (Addimplement addimpl) {This.addimpl = Addimpl; };}  Class Instantcoffee extends coffee{public void Setaddimpl (Addimplement addimpl) {System.out.println        Instantcoffee ^_^");    Super.setaddimpl (Addimpl); }}class Lattecoffee extends coffee{public void Setaddimpl (Addimplement addimpL) {System.out.println ("This is a lattecoffee ^_^");    Super.setaddimpl (Addimpl); }}class Mochacoffee extends coffee{public void Setaddimpl (Addimplement addimpl) {System.out.println ("This is a        Mochacoffee ^_^");    Super.setaddimpl (Addimpl); }   }

Maintest.java

Package Coffee;import Java.util.scanner;public class Maintest {public static void main (string[] args) {Sca        Nner in = new Scanner (system.in);        String choice = new String ();        String addsth = new string ();        while (true) {System.out.println ("What kind of the coffe would you want?");             Choice = In.nextline (); System.out.println ("What would do I like to add?")        Sugar or Milk? ");        Addsth = In.nextline ();            if (Choice.equals ("Instantcoffee")) {Coffee C1 = new Instantcoffee ();                if (Addsth.equals ("Sugar")) {addimplement A1 = new addsugarimplement ();                C1.setaddimpl (A1);            C1.add ();                }else if (addsth.equals ("Milk")) {addimplement a2 = new addmilkimplement ();                C1.setaddimpl (A2);            C1.add ();            }else{System.out.println ("Sorry,we don ' t has this kind of things *_*"); }}else if (ChoIce.equals ("Lattecoffee")) {Coffee C1 = new Lattecoffee ();                if (Addsth.equals ("Sugar")) {addimplement A1 = new addsugarimplement ();                C1.setaddimpl (A1);            C1.add ();                }else if (addsth.equals ("Milk")) {addimplement a2 = new addmilkimplement ();                C1.setaddimpl (A2);            C1.add ();            }else{System.out.println ("Sorry,we don ' t has this kind of things *_*");            }}else if (Choice.equals ("Mochacoffee")) {Coffee C1 = new Mochacoffee ();                if (Addsth.equals ("Sugar")) {addimplement A1 = new addsugarimplement ();                C1.setaddimpl (A1);            C1.add ();                }else if (addsth.equals ("Milk")) {addimplement a2 = new addmilkimplement ();                C1.setaddimpl (A2);            C1.add (); }else{System.out.println ("Sorry,we don T" has this kind of things *_*");        }}else{System.out.println ("We don t has this kind of coffee*_*"); }        }            }}

Simulates a file copy process Test.java

Package test;//system classified as abstract class attribute{int cnt;//public abstract void Operation1 ();    public abstract void output ();    public abstract void copy (); public abstract void Traversedirectory ();}    Category Class folder extends attribute{private attribute [] parts = new ATTRIBUTE[100];    private String name;    public int cnt = 0;    private int index = 0;    Constructor Section folder () {} folder (String name) {this.name = name; }//Copy operation//public void Operation1 () {//System.out.println ("Copy file:" + name);//} public void Output () {S    Ystem.out.println ("+" + name);        } public void Add (Folder name) {Parts[index] = name;        index++;            name.cnt = this.cnt + 1;        } public void Add (File name) {Parts[index] = name;        index++;    name.cnt = this.cnt + 1;                The public boolean remove (attribute a) {for (int i = 0; i < index; i++) {if (Parts[i].equals (a)) {             Parts[i] = null;   return true;    }} return false;    }//There are several operations public int getchild () {return index;        }//Traverse operation public void Traversedirectory () {this.output (); for (int i = 0, i < index; i++) {for (int k = 0; k <= this.cnt; k++) {System.out.print            ("    ");        } this.parts[i].traversedirectory ();        }} public void Copy () {System.out.println ("Copy file:" + name);        for (int j = 0; J < This.index; J + +) {this.parts[j].copy ();    }}}//class file extends attribute{public String name;    public int cnt = 0;    File (String name) {this.name = new String (name);    } public void Output () {System.out.println ("-" + name);    } public void Copy () {System.out.println ("Copy file:" + name);        }//public void Operation1 () {///SYSTEM.OUT.PRINTLN ("Copy file:" + name),//} public void Traversedirectory () {    This.output (); }}publicClass test{public static StringBuffer st = new StringBuffer ();        public static void Main (string[] args) {Folder document = new Folder ("My Profile");        File book = new file ("Java programming idea. pdf");        Folder Music = new Folder ("My Music");        File Music1 = new file ("You Are My eyes. mp3");        File Music2 = new file ("Without You.mp3");        Folder Picture = new Folder ("My Photos");        File Pic1 = new file ("My photo at the White House in the United States");        File Pic2 = new file ("My photos in Singapore");        File PIC3 = new file ("My photos in Antarctica");        File Pic4 = new file ("My photos in South Africa");                File PIC5 = new file ("I have a big photo with Xi");        Document.add (book);        Document.add (music);        Music.add (MUSIC1);        Music.add (MUSIC2);        Picture.add (PIC1);        Picture.add (PIC2);        Picture.add (PIC3);        Picture.add (PIC4);                        Picture.add (PIC5);        Document.copy ();        System.out.println ("-------------------------------");        Document.traversedirectory (); Picture.traversedirectory(); }}

Java Internship two