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我是新來的java和學習，因爲我現在正在研究數組，我似乎不知道我在做什麼錯這裏。我不認爲它正在以正確的方式提取數據，this program is suppose to read data from a text file, and ask the user for additional inputs, then display a report.我似乎有捐贈輸出位的問題，因爲我還沒有得到它的工作一次...程序的劑量編譯和運行，NetBeans說它的一切綠色，除了顯示方法下面的禁用代碼位之外。任何建議，意見和正確的方向點非常感謝=） 也可以使用一些建議，以獲得小數位排列在一起的所有文本文件輸出和程序顯示輸出。存儲和檢索數組中的數據，導出到文本文件
主類
import java.util.Scanner;
public class MyEventManager
{
public static void main(String [] args)
{
Scanner keyboard = new Scanner(System.in);
System.out.printf("\nI will read a text file then add it with user "
+ "inputs in \norder to display and export a report detailing "
+ "an event.\n\n");
boolean startOver = false;
if (startOver == false) //enter loop
{
do
{
//ticket price
System.out.printf("What is the single ticket price for "
+ "the event? ");
double singleTicket = keyboard.nextDouble();
//maximum number of donations
System.out.printf("What is the maximum number of donations "
+ "expected for the event? ");
int maxDonations = keyboard.nextInt();
//create a new object for event class
MyEventClass myEvent = new MyEventClass(singleTicket,
maxDonations);
if (myEvent.fruityLoops == false)
do
{
myEvent.readAllData();
}
while (myEvent.fruityLoops != true);
myEvent.displayResults();
System.out.printf("\nWould you like to run program again? "
+ "[Y/N] - ");
String questionAskLoop = keyboard.next();
if ("N".equalsIgnoreCase(questionAskLoop))
{
startOver = true; //sets exit condition to end program...
}
}
while(startOver != true);
}
}
}
第二類
import java.util.Scanner;
import java.io.*;
import java.util.Arrays;
public class MyEventClass
{
private final double TICKET_PRICE;
private final int []moneyDonated;
private double totalTicketsSold;
private int DONATION_ARRAY_SIZE;
private int storedAmountDonations;
private double moneySpent;
boolean fruityLoops;
private boolean donationSuccess;
public static char amountType;
public static double amount;
public MyEventClass (double singleTicket, int maxDonations)
{
this.moneyDonated = new int[]{DONATION_ARRAY_SIZE};
this.fruityLoops = false;
this.TICKET_PRICE = singleTicket;
this.DONATION_ARRAY_SIZE = maxDonations;
this.moneySpent = 0;
}
public boolean myDonation (double donationAmount, int[] moneyDonated)
{
if (storedAmountDonations == DONATION_ARRAY_SIZE)
{
return false;
}
else
{
moneyDonated[storedAmountDonations] = (int) donationAmount;
storedAmountDonations++;
return true;
}
}
public void addNewTickets (double addedTickets)
{
totalTicketsSold += (int) addedTickets;
}
public double getTicketSales()
{
return totalTicketsSold;
}
public double getTicketEnd()
{
double ticketEnd = totalTicketsSold * TICKET_PRICE;
return ticketEnd;
}
public int [] getMoneyDonated (int[] moneyDonated)
{
//Calculate and return the total amount of money donated
return moneyDonated;
}
public int storedAmountDonations()
{
return storedAmountDonations;
}
public double getMoneySpent()
{
return moneySpent;
}
public void sortMethod (char amountType, double amount)
{
if(amount <= 0) //positive amount check
{
throw new IllegalArgumentException("Error Code B-90: Invalid amount "
+ "(not over 0) -- line: " + amountType + " " + amount
+ " ignored");
}
else if (amountType == 'T' || amountType == 't') //tickets
{
addNewTickets(amount);
}
else if (amountType == 'D' || amountType == 'd') //donations
{
myDonation(amount, moneyDonated);
if (donationSuccess == false) //checks if array is full
{
throw new ArrayIndexOutOfBoundsException ("Error code B-103: "
+ "The array is full " + amount + " will not be stored"
+ " in the array");
}
}
else if (amountType == 'E' || amountType == 'e') //amount spent
{
moneySpent += amount;
}
else
throw new IllegalArgumentException("Error Code B-113: Invalid item "
+ "type (not T, D, or E) -- line: " + amountType + " "
+ amount + " ignored");
}
public void readAllData()
{
int lineCount = 0;
Scanner keyboard = new Scanner(System.in);
System.out.printf("\nPlease input the file location: ");
String readFile = keyboard.next();
try
{
File inputFile = new File (readFile);
Scanner scanFile;
scanFile = new Scanner(inputFile);
System.out.println("Reading data file....");
while (scanFile.hasNext())
{
amountType = scanFile.next().charAt(0);
amount = scanFile.nextDouble();
lineCount++;
try
{
sortMethod(amountType, amount);
}
catch (IllegalArgumentException a)
{
System.out.printf("\nError code B-145: An error occured "
+ "while attempting to add the data from file");
}
catch (ArrayIndexOutOfBoundsException b)
{
System.out.printf("\nError code B-150: An error occured "
+ "while attempting to add to the array.");
}
}
scanFile.close();
System.out.printf("\nThe total amount of readable lines where "
+ lineCount + " lines.\n\n");
}
catch (FileNotFoundException c)
{
System.out.printf("\nError code B-160: The file " + readFile
+ " was not found!\n");
fruityLoops = false; //restart program
}
fruityLoops = true; //contuine on with program
}
public int getLowest (int[] moneyDonated)
{
int lowValue = moneyDonated[0];
for(int i=1;i < moneyDonated.length;i++)
{
if(moneyDonated[i] < lowValue)
{
lowValue = moneyDonated[i];
}
}
return lowValue;
}
public double getAverage(int[] moneyDonated)
{
int sum = moneyDonated[0];
for(int i=1;i < moneyDonated.length;i++)
sum = sum + moneyDonated[i];
double advValue = sum/moneyDonated.length;
return advValue;
}
public int getHighest (int[] moneyDonated)
{
int maxValue = moneyDonated[0];
for(int i=1;i < moneyDonated.length;i++)
{
if(moneyDonated[i] > maxValue)
{
maxValue = moneyDonated[i];
}
}
return maxValue;
}
public void displayResults()
{
double income = 0;//moneyDonated + ticketEnd;
double profits = income - moneySpent;
Scanner keyboard = new Scanner (System.in);
System.out.printf("\nWhere is the file for the report export? ");
String reportFile = keyboard.next();
try
{
File outputFile = new File (reportFile);
Scanner scanFile = new Scanner (outputFile);
System.out.println("Generating output data file....");
try (BufferedWriter writer =
new BufferedWriter(new FileWriter(outputFile)))
{
writer.write("Event Overall Outcome:");
writer.newLine();
writer.write("Ticket Price %15.2f" + TICKET_PRICE);
writer.newLine();
writer.newLine();
writer.write("Donation Analysis:");
writer.newLine();
writer.write("Lowest donation " + getLowest (moneyDonated));
writer.newLine();
writer.write("Adverage donation " + getAverage (moneyDonated));
writer.newLine();
writer.write("Highest donation " + getHighest(moneyDonated));
writer.newLine();
writer.newLine();
writer.write("Profit/Loss Results:");
writer.newLine();
writer.write(totalTicketsSold + "Tickets sold" + getTicketEnd());
writer.newLine();
writer.write(storedAmountDonations() + " Donations "
+ Arrays.toString(moneyDonated) + " +");
writer.newLine();
writer.write(" --------");
writer.newLine();
writer.write("Total Income " + "%14.2f" + income);
writer.newLine();
writer.write("Total Expenses " + "%12.2f" + " -" + moneySpent);
writer.newLine();
writer.write(" --------");
writer.newLine();
if (profits < 1)
{
writer.write(" Event Losses " + "%13.2f " + profits);
}
else
{
writer.write(" Event Profits " + "%13.2f " + profits);
}
writer.flush();
writer.close();
}
catch (IOException d)
{
System.out.printf("\nError code B-280: There was an error "
+ "while attempting to write to " + reportFile
+ "\nThe file may be damaged!");
}
System.out.printf("\nOutput Success!");
}
catch (FileNotFoundException d)
{
System.out.printf("\nError code B-288: The file " + reportFile
+ " could not be opened! The report cannot be generated.\n");
}
System.out.printf("\nEvent Overall Outcome:");
System.out.printf("\n\n Ticket Price %15.2f", TICKET_PRICE);
System.out.printf("\n\n Donation Analysis: ");
/*System.out.printf("\n Lowest donation " + "%10.2f",
getLowest (moneyDonated));
System.out.printf("\n Adverage donation " + "%10.2f",
getAverage (moneyDonated));
System.out.printf("\n Highest donation " + "%10.2f",
getHighest(moneyDonated));*/
System.out.printf("\n\n Profit/Loss Results: ");
System.out.printf("\n " + totalTicketsSold + " Tickets sold "
/*+ "%3.2f"*/ + getTicketEnd());
System.out.printf("\n " + storedAmountDonations() + " Donations "
/* + "%3.2f"*/ + Arrays.toString(moneyDonated) + " +");
System.out.printf("\n --------");
System.out.printf("\n Total Income " + "%14.2f", income);
System.out.printf("\n Total Expenses " + "%12.2f" + " -", moneySpent);
System.out.printf("\n --------");
if (profits < 1)
{
System.out.printf("\n Event Losses " + "%13.2f \n\n", profits);
}
else
{
System.out.printf("\n Event Profits " + "%13.2f \n\n", profits);
}
}
}
這是文本文件輸入
T 25
E 210.99
T 1
D 500.00
E 134.67
D 1
這是文本文件輸出
Event Overall Outcome:
Ticket Price %15.2f60.0
Donation Analysis:
Lowest donation 500
Adverage donation 500.0
Highest donation 500
Profit/Loss Results:
26.0Tickets sold1560.0
1 Donations [500] +
--------
Total Income %14.2f0.0
Total Expenses %12.2f -345.65999999999997
--------
Event Losses %13.2f -345.65999999999997
而且最後是這樣的程序顯示在屏幕上什麼......
run:
I will read a text file then add it with user inputs in
order to display and export a report detailing an event.
What is the single ticket price for the event? 25
What is the maximum number of donations expected for the event? 2
Please input the file location: event.txt
Reading data file....
Error code B-150: An error occured while attempting to add to the array.
Error code B-150: An error occured while attempting to add to the array.
The total amount of readable lines where 6 lines.
Where is the file for the report export? export.txt
Error code B-288: The file texport.txt could not be opened! The report
cannot be generated.
Event Overall Outcome:
Ticket Price 25.00
Donation Analysis:
Profit/Loss Results:
26.0 Tickets sold 650.0
1 Donations [500] +
--------
Total Income 0.00
Total Expenses 345.66 -
--------
Event Losses -345.66
Would you like to run program again? [Y/N] -
正如一個供參考，對我異常錯誤代碼的是主類和B是第二類，數量如下是消息來自的代碼行。只是我試圖幫助我更快地找到我的地方...
我的目標是讓顯示看起來像這樣。
你有太多的代碼和太少的信息，因爲這裏面臨的實際問題。 – tnw
我的問題是我的捐款數組沒有將捐贈金額從文本文件存儲到數組中並正確顯示 – Newb2Java
還顯示最低捐款金額，平均捐款金額，最高捐贈金額以及何時顯示輸出對於文本文件和程序我需要排列小數位.. – Newb2Java