I have a fairly simple question for you, regarding a getText().toString() method I'm using in an if statement.   Essentially, I'm asking the user a question. If they input the correct answer in the appropriate EditText, they move on to the next question. If not, they lose life. If their life is reduced to 0, they are sent back to the beginning of the game. If not, they must repeat the question. The problem I'm having while testing this is that after entering the correct answer, in this case "Atlantic", the method is executing as though the answer is wrong. Can anyone help with this?  PS I am aware that the Else If is redundant, it's just there for clarification purposes.  The code:      answerButton.setOnClickListener(new View.OnClickListener() {         public void onClick(View v) {             if (answerText.getText().toString() == "Atlantic") {                 KrakonQ2();             }             else if (answerText.getText().toString() != "Atlantic")             {                 thePlayer.setPlayerHP(thePlayer.getPlayerHP() - 20);                  if (thePlayer.getPlayerHP() &lt;= 0)                 {                     thePlayer.setPlayerPos(0);                     setupControls();                     RoomText.setText(thedungeon[thePlayer.getPlayerPos()].getName());                     setupDirectionButtons();                     thePlayer.setPlayerHP(100);                  }                 else                 {                     KrakonQ1();                 }               }          }     });
93
I've been using the == operator in my program to compare all my strings so far. However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.  Is == bad? When should it and should it not be used? What's the difference?
47989
Okay, we know that the following two lines are equivalent -    (0 == i) (i == 0)   Also, the first method was encouraged in the past because that would have allowed the compiler to give an error message if you accidentally used '=' instead of '=='.  My question is - in today's generation of pretty slick IDE's and intelligent compilers, do you still recommend the first method?    In particular, this question popped into my mind when I saw the following code -   if(DialogResult.OK == MessageBox.Show("Message")) ...    In my opinion, I would never recommend the above. Any second opinions?
7172
What would be the best way to look in a string[] to see if it contains a element. This was my first shot at it. But perhaps there is something that I am overlooking. The array size will be no larger than 200 elements.  bool isStringInArray(string[] strArray, string key) {     for (int i = 0; i &lt;= strArray.Length - 1; i++)         if (strArray[i] == key)             return true;     return false; }
80203
This error should be a simple one but I cant seem to make it work. The problem lies in the fact that this very same code works earlier in the program. I don's see any reason for it to be sending an error on this instance and not the four previous ones. Reference the code below, and feel free to provide any criticism you may have as it should make me better. If it matters, I am using Sharp Develop 2.2.  Here is an example of the code that works:  void calc2Click(object sender, EventArgs e) {     if (!String.IsNullOrEmpty(tb2_fla.Text) &amp; String.IsNullOrEmpty(tb2_e.Text) | String.IsNullOrEmpty(tb2_fla.Text) &amp; String.IsNullOrEmpty(tb2_e.Text) | String.IsNullOrEmpty(tb2_e.Text))     {         MessageBox.Show("Enter either kVA and Voltage or FLA and Voltage", "Invalid Data Entry", MessageBoxButtons.OK);     }                 if (!String.IsNullOrEmpty(tb2_kva.Text) &amp; !String.IsNullOrEmpty(tb2_e.Text))     {              decimal x, y, z;             x = decimal.Parse(tb2_kva.Text);                   y = decimal.Parse(tb2_e.Text);             z = (x * 1000) / (1.732050808m * y); //the m at the end of the decimal allows for the multiplication of decimals                 tb2_fla.Text = z.ToString();             tb2_fla.Text = Math.Round(z,2).ToString();     }         else     {         if (!String.IsNullOrEmpty(tb2_fla.Text) &amp; !String.IsNullOrEmpty(tb2_e.Text))     {              decimal x, y, z;             x = decimal.Parse(tb2_fla.Text);                   y = decimal.Parse(tb2_e.Text);             z = (x * y * 1.732050808m) / 1000; //the m at the end of the decimal allows for the multiplication of decimals               tb2_kva.Text = Math.Round(z,2).ToString();      }   Here is the example of the code that sends the error in the subject line of this post:  void Calc4Click(object sender, EventArgs e) {         if (!String.IsNullOrEmpty(tb4_fla.Text) &amp;&amp; String.IsNullOrEmpty(tb4_e.Text) || String.IsNullOrEmpty(tb4_kw.Text) &amp; String.IsNullOrEmpty(tb4_e.Text) || String.IsNullOrEmpty(tb4_e.Text))         {   //If values are entered improperly, the following message box will appear         MessageBox.Show("Enter either FLA and Voltage or kW and Voltage", "Invalid Data Entry", MessageBoxButtons.OK);         }              if (!String.IsNullOrEmpty(tb4_fla.Text)&amp;&amp; !String.IsNullOrEmpty(tb4_e.Text)&amp;&amp; String.IsNullOrEmpty(tb4_kw.Text))         {//If the user eneters FLA and Voltage calculate for kW              decimal x, y, z;             x = decimal.Parse(tb4_fla.Text);             y = decimal.Parse(tb4_e.Text);             z = (x*y)*(.8 * 1.732050808m);             tb4_kw.Text = Math.Round(z,0).ToString();          }                         if (!String.IsNullOrEmpty(tb4_kw.Text) &amp;&amp; !String.IsNullOrEmpty(tb4_e.Text) &amp;&amp; String.IsNullOrEmpty(tb4_fla.Text))         {;//If the user enters kW and Voltage calculate for FLA             decimal x, y, z;             x = decimal.Parse(tb4_kw.Text);             y = decimal.Parse(tb4_e.Text);             z = (1000 * x)/(y * 1.732050808m)* .8;             tb4_fla.Text = Math.Round(z,0).ToString();         }      }   I appreciate any help that I can get.  Thank you.
78724
This code in JS gives me a popup saying "i think null is a number", which I find slightly disturbing. What am I missing?    if (isNaN(null)) {   alert("null is not a number"); } else {   alert("i think null is a number"); }     I'm using Firefox 3. Is that a browser bug?  Other tests:    console.log(null == NaN);   // false console.log(isNaN("text")); // true console.log(NaN == "text"); // false     So, the problem seems not to be an exact comparison with NaN?  Edit: Now the question has been answered, I have cleaned up my post to have a better version for the archive. However, this renders some comments and even some answers a little incomprehensible. Don't blame their authors. Among the things I changed was:   Removed a note saying that I had screwed up the headline in the first place by reverting its meaning Earlier answers showed that I didn't state clearly enough why I thought the behaviour was weird, so I added the examples that check a string and do a manual comparison.
88238
I have problem in some JavaScript that I am writing where the Switch statement does not seem to be working as expected.  switch (msg.ResultType) {   case 0:     $('#txtConsole').val("Some Val 0");     break;   case 1:     $('#txtConsole').val("Some Val 1");     break;   case 2:     $('#txtConsole').text("Some Val 2");     break; }   The ResultType is an integer value 0-2 and I can see that in FireBug.  In all cases, the switch transfers control to the final break statement which means all the logic is completely skipped.  What am I missing?
69850
I have the following code:  Using cmd As SqlCommand = Connection.CreateCommand     cmd.CommandText = "UPDATE someTable SET Value = @Value"     cmd.CommandText &amp;= " WHERE Id = @Id"     cmd.Parameters.AddWithValue("@Id", 1234)     cmd.Parameters.AddWithValue("@Value", "myValue")     cmd.ExecuteNonQuery End Using   I wonder if there is any way to get the final SQL statment as a String, which should look like this:  UPDATE someTable SET Value = "myValue" WHERE Id = 1234   If anyone wonders why I would do this:   for logging (failed) statements for having the possibility to copy &amp; paste it to the Enterprise Manager for testing purposes
85933
I was writing a toString() for a class in Java the other day by manually writing out each element of the class to a String and it occurred to me that using reflection it might be possible to create a generic toString() method that could work on ALL classes. I.E. it would figure out the field names and values and send them out to a String.  Getting the field names is fairly simple, here is what a co-worker came up with:  public static List initFieldArray(String className) throws ClassNotFoundException {      Class c = Class.forName(className);     Field field[] = c.getFields();     List&lt;String&gt; classFields = new ArrayList(field.length);      for (int i = 0; i &lt; field.length; i++) {         String cf = field[i].toString();         classFields.add(cf.substring(cf.lastIndexOf(".") + 1));     }      return classFields; }   Using a factory I could reduce the performance overhead by storing the fields once, the first time the toString() is called. However finding the values could be a lot more expensive.  Due to the performance of reflection this may be more hypothetical then practical. But I am interested in the idea of reflection and how I can use it to improve my everyday programming.
119860
A weird bug was occurring in production which I was asked to look into. The issue was tracked down to a couple of variables being declared within a For loop and not being initialized on each iteration. An assumption had been made that due to the scope of their declaration they would be &quot;reset&quot; on each iteration. Could someone explain why they would not be)? (My first question, really looking forward to the responses.) The example below is obviously not the code in question but reflects the scenario:  Please excuse the code example, it looks fine in the editor preview?? for (int i =0; i&lt; 10; i++) {     decimal? testDecimal;     string testString;      switch( i % 2  )     {         case 0:         testDecimal = i / ( decimal ).32;         testString = i.ToString();             break;         default:             testDecimal = null;             testString = null;             break;     }      Console.WriteLine( &quot;Loop {0}: testDecimal={1} - testString={2}&quot;, i, testDecimal , testString ); }   EDIT: Sorry, had to rush out for child care issue. The issue was that the prod code had was that the switch statement was huge and in some &quot;case&quot;'s a check on a class' property was being made, like if (myObject.Prop != null) then testString = myObject.Stringval... At the end of the switch, (outside) a check on testString == null was being made but it was holding the value from the last iteration,hence not being null as the coder assumed with the variable being declared within the loop. Sorry if my question and example was a bit off, I got the phone call about the day care as I was banging it together. I should have mentioned I compared IL from both variables in and out the loop. So, is the common opinion that &quot;obviously the variables would not be reinitialized on each loop&quot;? A little more info, the variables WHERE being initialized on each iteration until someone got over enthusiastic with ReSharper pointing out &quot;the value is never used&quot; and removed them.  EDIT: Folks, I thank you all. As my first post I see how much clearer I should be in the future. The cause of our unexpected variable assignment can me placed on an inexperienced developer doing everything ReSharper told him and not running any unit tests after he ran a &quot;Code Cleanup&quot; on an entire solution. Looking at the history of this module in VSS I see variables Where declared outside of the loop and where initialized on each iteration. The person in question wanted his ReSharper to show &quot;all green&quot; so &quot;moved his variables closer to assignment&quot; then &quot;Removed redundant assignment&quot;! I don't think he will be doing it again...now to spend the weekend running all the unit tests he missed! How to do mark a question as answered?
111151
Can I simply use  if(myString == nil)   For some reason a string that I know is null, is failing this statement.
95328
Why don't we use "to generate" or "to get"?  E.g.: "External component has thrown an exception", "JavaScript had just thrown an error straight away", "Instances of Error objects are thrown when runtime errors occur".
106050
Hi I'm pretty new to Stack Overflow so I hope that I'm doing this correctly and that someone out there has the answer I need.  I'm currently coding a program in Java with Eclipse IDE an my question is this:  I need a snippet of code that does the following  It's supposed to get a .TXT file containing text and from that .TXT file  count the number of rows and print it,  count the number of words and print it,  count the number of characters and print it. And finally make a list of the top 10 words used and print that.  Allt the printing is done to system outprintln  I'm pretty new to Java and am having some difficulties.  Anyone out there who can provide me with these lines of code or that knows where i can find them? I want to study the code provided that's how I learn best=)  Thanks to all   Didnt find the edit button sorry...  I Added this to my question:  Hehe it´s an assignment but not a homework assignment ok i see well i could provide what i've done so far, i think im pretty close but it´s not working for me. Is there anything i have missed?  // Class    Tip   import java.io.*; import java.util.*;  class Tip {     public static void main(String [] args) throws Exception     {          String root = System.getProperty("user.dir");            InputStream is = new FileInputStream( root + "\\tip.txt" );         Scanner scan = new Scanner( is );          String tempString = "";         int lines = 0;         int words = 0;         Vector&lt;Integer&gt; wordLength = new Vector&lt;Integer&gt;();         int avarageWordLength = 0;          while(scan.hasNextLine() == true)         {                 tempString = scan.nextLine();                 lines++;         }          is.close();          is = new FileInputStream( root );         scan = new Scanner( is );          while(scan.hasNext() == true)         {                 tempString = scan.next();                 wordLength.add(tempString.length());                 words++;         }          for(Integer i : wordLength)         {                 avarageWordLength += i;         }         avarageWordLength /= wordLength.size();           System.out.println("Lines : " + lines);         System.out.println("Words : " + words);         System.out.println("Words Avarage Length : " + avarageWordLength);          is.close();          } }
57093
I think there's a lot for me to learn about data types. Why this happens  double result = ((3/8)*100).ToString();   it gives zero .. should be 37,5 ... :(
5691
Is there a better way of getting this result? This function fails if num has more digits than digits, and I feel like it should be in the library somewhere (like Integer.toString(x,"%3d") or something)  static String intToString(int num, int digits) {     StringBuffer s = new StringBuffer(digits);     int zeroes = digits - (int) (Math.log(num) / Math.log(10)) - 1;      for (int i = 0; i &lt; zeroes; i++) {         s.append(0);     }     return s.append(num).toString(); }
119047
I'm making a very basic  type of game in JavaScript. I'm a beginner, so I'm just doing this for fun and learning, and due to bad planning I have run into a bit of a problem when you get to a branch in dialogue.  Currently I hold the script for the game in a string variable and I break up each scene with a tag such as "#~" into smaller arrays so that the game script looks like this:  var script = "Hello World!#~How are you today?" var gameText = script.split("#~"); //gameText[0]= Hello World!   This works great for linear stuff, but how should I handle a branch in the dialogue tree? This method seems very complicated, as I would have to know exactly how long each path is and then if I ever needed to change anything it would be a headache.  How can I do this in a simpler way? I'm trying to stick to vanilla JavaScript as I'd like the game to work with Web Run Time.
35663
My controller code is as follows -          for(String resStr : responseArray){             if(resStr.indexOf('r_error_str') != -1){                 responseString += resStr.substring(resStr.indexOf('=') + 1);                  responseString += '\n';             }         }   but when i display this 'responseString ' String using 'apex:outputLabel or apex:outputText or as Exception message '\n' is not converting in new line. Whole String is coming in one line.  Can anyone explain why is this happining
106441
I have a method like this:  public static &lt;T&gt; boolean isMemberOf(T item, T[] set) {     for (T t : set) {         if (t.equals(item)) {             return true;         }     }     return false; }   Now I try to call this method using a char for T:  char ch = 'a'; char[] chars = new char[] { 'a', 'b', 'c' }; boolean member = isMemberOf(ch, chars);   This doesn't work. I would expect the char and char[] to get autoboxed to Character and Character[], but that doesn't seem to happen.  Any insights?