Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I'm guessing it's because you have:</p> <pre><code> while (inputFile.hasNext()) </code></pre> <p>Use <em>Scanner.hasNextLine</em>.</p> <p><strong>Edit</strong>:</p> <p>I tested your code with your sample input. I see what you mean now. </p> <pre><code>while ( inputFile.hasNextLine() ) { employeeID = inputFile.nextLine(); // Read info from first line and store it in employeeID employeeName = inputFile.nextLine(); // Read info from next line and store it in employeeName userInput = JOptionPane.showInputDialog( "Employee Name: " + employeeName + "\nEnter number of" + // display employee name and ask for number of hours worked " hours worked:" ); hours = Double.parseDouble( userInput ); // Store user's parsed input into hours wageRate = inputFile.nextDouble(); // Read info from next line and store it in wageRate taxRate = inputFile.nextDouble(); // Read info from next line and store it in taxRate </code></pre> <p>Using <em>hasNextLine</em> as your condition will only ensure that the next call to <em>nextLine</em> will be valid. But, your calling <em>nextLine</em> twice, and then calling <em>nextDouble</em> after that. You can either (1) ensure that the calls your making match up with the file exactly, or (2) check that there is a next token every time you call <em>next</em>. I think (1) is your problem.</p> <p>I was able to fix your program with the following:</p> <pre><code>while ( inputFile.hasNextLine() ) { employeeID = inputFile.nextLine(); employeeName = inputFile.nextLine(); userInput = JOptionPane.showInputDialog( "Employee Name: " + employeeName + "\nEnter number of hours worked:" ); hours = Double.parseDouble( userInput ); wageRate = Double.parseDouble(inputFile.nextLine()); taxRate = Double.parseDouble(inputFile.nextLine()); Paycheck paycheck = new Paycheck( employeeID, employeeName, wageRate, taxRate, hours ); paycheck.calcWages(); JOptionPane.showMessageDialog( null, "Employee ID: " + paycheck.getEmployeeID() + "\nName: " + paycheck.getEmployeeName() + "\nHours Worked: " + hours + "\nWage Rate: $" + money.format( paycheck.getWageRate() ) + "\nGross Pay: $" + money.format( paycheck.getGrossPay() ) + "\nTax Rate: " + paycheck.getTaxRate() + "\nTax Withheld: $" + money.format( paycheck.getTaxWithheld() ) + "\nNet Pay: $" + money.format( paycheck.getNetPay() ) ); } </code></pre> <p>The file contents:</p> <pre><code>00135 John Doe 10.50 0.20 00179 Mary Brown 12.50 1.20 </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POerror when reading data, manipulating it, and outputting it
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USblackcompe
    1. USblackcompe
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI'm checking to see if inputFile, which is an instance I created of the Scanner class, has a next line of a .txt document. I don't understand what you are asking of me. It reads in everything fine, but when there is o more information to read, it crashes.
      singulars
      1. PO
      1. USLeon
    2. COYou are using [hasNext()](http://download.oracle.com/javase/1,5,0/docs/api/java/util/Scanner.html#hasNext()), and then you call [nextLine()](http://download.oracle.com/javase/1,5,0/docs/api/java/util/Scanner.html#nextLine()) twice. So eventually you will get a "java.util.NoSuchElementException: No line found". This two methods have diferent delimiters. You are reading line by line, so check for new lines.
      singulars
      1. PO
      1. USDarkByte
    3. COThe only problem is that I have data like this: (Line 1) 00135 (Line 2) John Doe (Line 3) 10.50 (Line 4) 0.20 (Line 5) *empty* (Line 6) 00179 (Line 7) Mary Brown etc.. If I call <nextLine()> once, on my 2nd loop it shows the employee's ID as the name in my <JOptionPane.showMessageDialog>. If I call <nextLine()> twice, it shows the employee's name correctly in the JOptionPane, but then I get the error
      singulars
      1. PO
      1. USLeon
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload