可以拜托帮我看看我的java code吗^_^

qiqimon5566 · 发表于 26-6-2010 07:56 PM

java assignment的 due date快到了><"
希望佳礼的各位programming前辈们可以帮我看看我的code
请给我一些提示多多指教

import java.util.Scanner; //import java.util.Scanner class to read user input
import java.util.InputMismatchException;
public class Main //public class that contain public static void main
{
private static Scanner scan = new Scanner(System.in);
private static Assest[] ass = new Assest[100]; // array of objects
private static int choice = 0;//choice is used to control switch statement
private static int choice2 = 0;// choice 2 is used to control switch statement
private static int a, b; //a and b are used to control for loop
private static int counter = 0; //how many assests user want to enter, and which assest user want to add, amend, write-off, searching
private static String question; //question ask user is he/she really want to written-off that assest
private static boolean loop = true; //determine anymore input is needed
private static String mainID, mainDS, mainDT;
private static int mainOD = 0;
private static double mainCP = 0.0;
public static void main(String[] args)
{
for(a = 0; a < 100 ; a++)
{
ass[a] = new Assest(); // initialize all assests as empty assests by using default constructor
}
do
{
try
{
System.out.println("How many assest do you want to enter (only 1-100)? : "); //prompt user how many assest user want to enter
counter = scan.nextInt();
loop=false;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only accept number without decimal");
scan.nextLine();
loop = true;
}
}while(loop || counter < 1 || counter > 100);
for(a = 0; a < counter; a++) //prompt user to key-in all the details of assest
{
scan.nextLine();
System.out.println((a+1) + " assest - assest ID :");
mainID = scan.nextLine();
System.out.println((a+1) + " assest - description :");
mainDS = scan.nextLine();
System.out.println((a+1) + " assest - date purchased :");
mainDT = scan.nextLine();
do
{
try
{
System.out.println((a+1) + " assest - order number :");
mainOD = scan.nextInt();
System.out.println((a+1) + " assest - cost price :");
mainCP = scan.nextDouble();
loop=false;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only numbers are accepted");
scan.nextLine();
loop=true;
}
}while(loop);
System.out.println("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
ass[a] = new Assest(mainID , mainDS , mainDT , mainOD ,mainCP);
}
//do-while to control the remaining program, it will continue running unless user change the value of choice to -1
do
{
do
{
try
{
System.out.println("\n----------------------------");
System.out.println("1. add new assest (1-100)");
System.out.println("2. amend an assest (1-100)");
System.out.println("3. search assest (1-100)");
System.out.println("4. write-off an asset (1-100)");
System.out.println("5. list all assest (1-100)");
System.out.println("6. equality checking (1-100)");
System.out.println(">>>There is " + Assest.getNo() + " Assest stored<<<");
System.out.println("---------(-1 to quit)--------");
choice = scan.nextInt();
loop=false;
if(choice == -1)
break;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only numbers are accepted");
scan.nextLine();
loop=true;
}
}while(loop);
switch (choice)
{
case 1: Add();
break;
case 2: Amend();
break;
case 3: Search();
break;
case 4: WriteOff();
break;
case 5: ListAll();
break;
case 6: Equality();
break;
}
}while(choice != -1); // while user didn't enter -1, this program will continue running
System.out.println("------------------\nThe End , Good bye\n------------------\n");
}
public static void Add()
{
do
{
try
{
System.out.println("How many assest do you want to enter (only 1-100 or -1 to leave)? : "); //allow to add new assest
counter = scan.nextInt();
loop=false;
if(counter == -1)
break;
if(counter > 0 && counter < 101){
if(ass[counter-1].getST().equals("Written-Off")) //don't allow user to add existing assest
{
scan.nextLine();
System.out.println((counter) + " assest - assest ID :");
mainID = scan.nextLine();
System.out.println((counter) + " assest - description :");
mainDS = scan.nextLine();
System.out.println((counter) + " assest - date purchased :");
mainDT = scan.nextLine();
do
{
try
{
System.out.println((counter) + " assest - order number :");
mainOD = scan.nextInt();
System.out.println((counter) + " assest - cost price :");
mainCP = scan.nextDouble();
loop=false;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only numbers are accepted");
scan.nextLine();
loop=true;
}
}while(loop);
System.out.println("@@@@@@@@@@@@@@@@@@@@@>>ADDED<<@@@@@@@@@@@@@@@@@@@@@");
ass[counter-1] = new Assest(mainID , mainDS , mainDT , mainOD , mainCP);
}
else
System.out.println("\n!!!!!Not allow to add existing assest!!!!!");
}
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only accept number without decimal");
scan.nextLine();
loop = true;
}
}while(loop || counter < 1 || counter > 100);
}

复制代码

qiqimon5566 · 发表于 26-6-2010 07:57 PM

接下去上面的code

public static void Amend(){
do
{
try
{
System.out.println("Which assest do you want to modify (only 1-100 or -1 to leave)? : "); //allow user to amend existing assest
counter = scan.nextInt();
loop=false;
if(counter == -1)
break;
if(counter > 0 && counter < 101)
{
System.out.println("\n" + "---------- " + (counter) + " ASSEST ----------");
ass[counter-1].list_search();
if(ass[counter-1].getST().equals("ON")) //don't allow user to amend not existing assest
{
do
{
System.out.println("Which detail do you want to modify : 1.ID 2.description 3.date purchased 4.order number 5.cost price (-1 to quit):");
choice2 = scan.nextInt();
switch (choice2)
{
case 1: System.out.println((counter) + " assest - assest ID : ");
scan.nextLine();
mainID = scan.nextLine();
ass[counter-1].setID(mainID);
System.out.println("You have succesful amended assest " + (counter) + " ID");
break;
case 2: System.out.println((counter) + " assest - description : ");
scan.nextLine();
mainDS = scan.nextLine();
ass[counter-1].setDS(mainDS);
System.out.println("You have succesful amended assest " + (counter) + " description");
break;
case 3: System.out.println((counter) + " assest - date purchased : ");
scan.nextLine();
mainDT = scan.nextLine();
ass[counter-1].setDT(mainDT);
System.out.println("You have succesful amended assest " + (counter) + " date purchased");
break;
case 4: do
{
try
{
System.out.println((counter) + " assest - order number : ");
mainOD = scan.nextInt();
ass[counter-1].setOD(mainOD);
System.out.println("You have succesful amended assest " + (counter) + " order number");
loop=false;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only numbers are accepted");
scan.nextLine();
loop=true;
}
}while(loop);
break;
case 5: do
{
try
{
System.out.println((counter) + " assest - cost price : ");
mainCP = scan.nextDouble();
ass[counter-1].setCP(mainCP);
System.out.println("You have succesful amended assest " + (counter) + " cost price");
loop=false;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only numbers are accepted");
scan.nextLine();
loop=true;
}
}while(loop);
break;
}
}while(choice2 != -1);
}
else
System.out.println("\n!!!!!Not allow to amend empty assest!!!!!");
}
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only accept number without decimal");
scan.nextLine();
loop = true;
}
}while(loop || counter < 1 || counter > 100);
}
public static void Search(){
do
{
try
{
System.out.println("Which assest are you looking for (only 1-100)? : "); // search for an assest
counter = scan.nextInt();
if(counter > 0 && counter < 101)
{
System.out.println("\n" + "---------- " + (counter) + " ASSEST ----------");
ass[counter-1].list_search();
}
else
System.out.println("Out of range");
loop=false;
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only accept number without decimal");
scan.nextLine();
loop = true;
}
}while(loop || counter < 1 || counter > 100);
}
public static void WriteOff(){
do
{
try
{
System.out.println("Which assest do you want to write-off (only 1-100 or -1 to leave) : "); //write-off an assest
counter = scan.nextInt();
if(counter == -1)
break;
if(counter > 0 && counter < 101)
{
if(ass[counter-1].getST().equals("ON"))
{
System.out.println("\n" + "---------- " + (counter) + " ASSEST ----------");
ass[counter-1].list_search();
System.out.println("Warning!!! you are going to write-off assest " + counter);
System.out.println("Are you sure u want to do this ? (y/n) : ");
question = scan.next();
if(question.equals("y"))
{
ass[counter-1] = new Assest();
System.out.println("You have been succesful written-off assest " + counter);
}
}
else
System.out.println("\n!!!!!Not allow to write-off empty assest!!!!!");
loop=false;
}
}
catch(InputMismatchException e)
{
System.out.println("Error Occured: only accept number without decimal");
scan.nextLine();
loop = true;
}
}while(loop || counter < 1 || counter > 100);
}
public static void ListAll(){
for(a = 0; a < 100 ; a++)
{ //list all hundred assest
if(ass[a].getST().equals("ON"))
{
System.out.println("\n" + "########## " + (a+1) + " ASSEST ##########");
ass[a].list_search();
System.out.println("##############################");
}
}
}
public static void Equality(){
for(a = 0; a < 50 ; a++)
{ // equality checking
for(b = a + 1; b < 100; b++)
{
if( ass[a].getID().equals(ass[b].getID()) && (ass[a].getST().equals("ON")))
{
Assest.setBLtrue(); // if equal boolean is true
System.out.println("There is atleast 2 assests contain the same assest ID");
break;
}
}
if(Assest.getBL() == true) //conditional statement that stop this nested loop when found one !!
break;
}
if(Assest.getBL() == false)
System.out.println("There is no assest contain the same assest ID");
Assest.setBLfalse();
}
}

复制代码

qiqimon5566 · 发表于 26-6-2010 07:59 PM

另外一个含有constructor的class

class Assest
{
private String assestID, description, datePurchased, status;
private int orderNumber;
private double costPrice;
private static boolean equal;
private static int assestNo = 0 ;
//no argument constructor that used to written-off or set assest to empty assest
public Assest()
{
assestID = "Empty";
description = "Empty";
datePurchased = "Empty";
status = "Written-Off";
orderNumber = 0;
costPrice = 0;
if(assestNo != 0){ //while the beginning of initializing (assestNo is equal to 0 no need to minus it)
assestNo--;
}
}
//---parameter constructor that used to set the value for all the details---
public Assest(String ID, String DS, String DT , int OD, double CP)
{
assestID = ID;
description = DS;
datePurchased = DT;
status = "ON";
orderNumber = OD;
costPrice = CP;
assestNo++;
}
//----------------All 8 getter methods, some is not in use----------------
public static boolean getBL()
{
return equal;
}
public static int getNo()
{
return assestNo;
}
public String getID()
{
return assestID;
}
public String getDS()
{
return description;
}
public String getDP()
{
return datePurchased;
}
public int getOD()
{
return orderNumber;
}
public double getCP()
{
return costPrice;
}
public String getST()
{
return status;
}
//-------------7 setter methods to change the value of private datas---------
public static void setBLtrue()
{
equal = true;
}
public static void setBLfalse()
{
equal = false;
}
public void setID(String ID)
{
assestID = ID;
}
public void setDS(String DS)
{
description = DS;
}
public void setDT(String DT)
{
datePurchased = DT;
}
public void setOD(int OD)
{
orderNumber = OD;
}
public void setCP(double CP)
{
costPrice = CP;
}
//------------------method used to print details of one assest---------------
void list_search()
{
System.out.println("assest - assest ID : " + assestID + "\n" +
"assest - description : " + description + "\n" +
"assest - date purchased : " + datePurchased + "\n" +
"assest - order number : " + orderNumber + "\n" +
"assest - cost price : " + costPrice + "\n" +
"assest - status : " + status);
}
//----------------------------------------------------------------------------
}

复制代码

拜托各位前辈们帮我看看谢谢^_^

兔仙人 · 发表于 27-6-2010 05:49 PM

你的 ERROR CONSOLE 那边出什么 ERROR 哦

?

qiqimon5566 · 发表于 27-6-2010 06:40 PM

本帖最后由 qiqimon5566 于 27-6-2010 06:43 PM 编辑

没有error.. 只是想知道这样的code 符合标准吗=="
因为code 只有1人在写我已经很累了
很懒惰去加更多的command block 或者 line 或者加强了
所以我的code 连一个JFrame dialog box GUI都没有
我知道这其实还蛮差和不负责任
可是我还是很希望听取各位前辈们的金玉良言
如果可以我想交了>_<"

兔仙人 · 发表于 28-6-2010 03:44 PM

其实你可以把那些 GET - SET 写在另外一个 CLASS FILE 里面 ( 通常我们叫 BEAN FILE ) ..

可以的话，就尽量用 ABSTRACT 或者 INTERFACE ，因为 JAVA 的 OOP concept 不鼓励一次过写完全部 CODE 在同一个 FILE 里面

qiqimon5566 · 发表于 5-7-2010 07:41 PM

其实你可以把那些 GET - SET 写在另外一个 CLASS FILE 里面 ( 通常我们叫 BEAN FILE ) ..

可以的话 ...
兔仙人发表于 28-6-2010 03:44 PM

谢谢你的建议
学校刚开始要教inheritance 和 abstract 所以将加在assignment2 ^^
目前的是assignment1 虽然学校教的唯一一个gui只有joptionpane
可是看到有一个人做了全gui jtextfield jframe jmenubar 等等
再看自己的感觉到自己好失败/.\

兔仙人 · 发表于 5-7-2010 10:25 PM

所以你要學習看 API

qiqimon5566 · 发表于 6-7-2010 08:28 PM

所以你要學習看 API
兔仙人发表于 5-7-2010 10:25 PM

请问什么是API?
还没学到== wiki解释看不太懂==

兔仙人 · 发表于 6-7-2010 09:40 PM

API , 學校是不會教的。

不過我給個例子你，你自己看看

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html

這個就是 STRING 的 API ，裡面有完全部用法。只要好好學習，以後 “錢途” 不是問題 ^^

qiqimon5566 · 发表于 7-7-2010 05:24 AM

API , 學校是不會教的。

不過我給個例子你，你自己看看

這個就是 STRING 的 API ，裡 ...
兔仙人发表于 6-7-2010 09:40 PM

谢谢你哦
我会加油的^^
那我想请问你
还有哪些是重要
又是学校不会教的吗?

兔仙人 · 发表于 7-7-2010 09:10 AM

本帖最后由兔仙人于 7-7-2010 09:12 AM 编辑

學校只是教基本的知識而已。。

例如 JAVA ，只是教基本的用法。如果想繼續 ADVANCE ，就得選擇你要走的方向。

PS ： J2SE ， J2ME ， J2EE 。本仙人認為 EE 比較有錢途

qiqimon5566 · 发表于 7-7-2010 09:45 AM

我刚刚把 j2se j2me j2ee j2fx 都下完了=_="
呵呵想问j2ee 和 j2se有不同吗？
我是买了本算是教得还蛮全面的java书
可是好像没教我分类和选择@_@
谢谢你的建议哦^_^ 我也想学enterprise edition ^_^

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