Databases
StackOverflow2013
Postsdbo
POI need to figure out the logical bug in my Code
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POI need to figure out the logical bug in my Code
    primarykey
    data
    text
    <p>when I call the method "getUnknownsAccel" with the problem1 object, for some reason the 'if' statement in the method is not executed to retrieve the value of the variable:</p> <pre><code>PhysicsProblem problem1 = new PhysicsProblem(accel, vI, vF, t, deltaX); System.out.println("Which variable are you solving for? "); String solveFor = scan.next(); // after receiving solveFor input, assesses data accordingly if (solveFor.equalsIgnoreCase("acceleration")) { System.out.println("Solving for Acceleration!"); System.out.println("Are there any other unknowns? (enter 'none' or the name " + "of the variable)"); missingVar = scan.next(); problem1.setMissingVar(missingVar); do { problem1.getUnknownsAccel(); System.out.println("Are there any other unknowns? (enter 'none' or the name " + "of the variable)"); missingVar = scan.next(); //// change all these in the program to scan.next, not scan.nextLine } while (!missingVar.equalsIgnoreCase("none") || !missingVar.equalsIgnoreCase("acceleration")); if (missingVar.equals("none")) { // Write code for finding solutions System.out.println("Assuming you have given correct values, the solution is: "); } } </code></pre> <p>After the do/while loop used to retrieve the name of the other variables that are unknown, I call the getUnknownsAccel method from this class file:</p> <pre><code>public void getUnknownsAccel() { //----------- // checks for another unknown value that is not accel //----------- if (missingVar.equalsIgnoreCase("time")) { System.out.println("Please enter the value for time: "); t = scan.nextDouble(); while (t &lt;= 0 || !scan.hasNextDouble()) { System.out.println("That is not an acceptable value!"); t = scan.nextDouble(); } } } </code></pre> <p>Let's assume for the sake of this problem, that the user WILL enter "time" as the unknown when prompted. Any idea why my code isn't executing the scan function to retrieve the time variable value? Instead, the program just repeats the system.out function "Are there any other unknowns..."</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USTommyD
    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. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POI need to figure out the logical bug in my Code
      1. This table or related slice is empty.
      1. VTDownMod
    1. COWhat is the exact value of `missingVar` when you enter `getUnknownsAccel()`? If you don't have a debugger handy, then you should fix that, but in the meantime, just print it back out before the `if()`.
      singulars
      1. POI need to figure out the logical bug in my Code
      1. USMichael Kjörling
    2. COassume the person would enter "time" when prompted. I'm assuming missingVar would be equal to "time" when I call getUnknownsAccel(); am I wrong?
      singulars
      1. POI need to figure out the logical bug in my Code
      1. USTommyD
    3. COHi. Asking people to spot errors in your code is not especially productive. You should use the debugger (or add print statements) to isolate the problem, by tracing the progress of your program, and comparing it to what you expect to happen. As soon as the two diverge, then you've found your problem. (And then if necessary, you should construct a [minimal test-case](http://sscce.org).)
      singulars
      1. POI need to figure out the logical bug in my Code
      1. USOliver Charlesworth
 

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