I'm a beginner in Java Eclipse. I am trying to read a .txt file, and use the data as a String value. However, when I use an if statement, the condition is not registering the value as a String and is therefore not meeting any conditions and I am only getting the final else. The purpose of my code is to read in a text file and determine the required value: i.e. if the line starts with &quot;avg&quot; , the program must display the average of the following numbers. My .txt file contents is this: min:1,2,3,4,5,6\n max:1,2,3,4,5,6\n avg:1,2,3,4,5,6 Here is a part of my code: public static void main(String[] args) throws IOException {          //declare variables     String line, operation;     int min, max, sum, num;     double avg;     List&lt;String&gt; lineArray;     String outputPath = &quot;C:\\output.txt&quot;;       //these are not the actual file paths, i just didnt      String inputPath = &quot;C:\\input.txt&quot;;         //want to give personal information.      //try open file     try {                  //create File instance           File text = new File (inputPath);            Scanner scnr = new Scanner(text);                                         //loop until end of text file         while ( scnr.hasNextLine() ) {                                          line = scnr.nextLine();                  //read line from text file             operation = line.substring(0,3);         //get operation from String data                          line = line.substring(4);                //get String value of numbers                           lineArray = Arrays.asList(line.split(&quot;,&quot;));     //separate string into array elements              //setup initial values             sum = 0;             min = Integer.parseInt(lineArray.get(0));     //convert to Int             max = Integer.parseInt(lineArray.get(0));                          //loop through line array and determine min, sum and max of each             for (int i = 0; i &lt; lineArray.size(); i++ ) {                                  num = Integer.parseInt(lineArray.get(i));                 sum += Integer.parseInt(lineArray.get(i));                 if (num &gt; max)  max = num;                 if (num &lt; max)  max = num;                              }                          avg = sum / lineArray.size();                             //the IF condition statement that is not working                             if (operation  == &quot;min&quot;) {                 System.out.println(min);             }                          else if (operation == &quot;max&quot;) {                 System.out.println(max);             }                          else if (operation == &quot;avg&quot;) {                 System.out.println(avg);             }                          else System.out.println(&quot;Error&quot;);                      }   //end of while loop                  scnr.close();                                                       //close scanner              }   //end of try          catch ( FileNotFoundException e ) {     }      }   //end of &quot;main&quot; class  When I manually set operation as &quot;min&quot; or &quot;max&quot; or &quot;avg&quot; the program works as it should.
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?
Are the decimal places in a CSS width respected? I have this rule in my iptables:  iptables -A INPUT -s 192.168.11.0/24 -j LOG   My question is:  Where is the iptables log file, and how can I change that? Can you dispel a magic effect you can't perceive? Discussions about Dispel Magic seem to imply that as long as you can perceive a magic effect in range of the spell, you can try and dispel it.   See  and  from @Miniman:      knowing where it is means that you know where it is. This allows you to use spells like Dispel Magic to remove its invisibility.   But what if you can't perceive it?  Two scenarios come in mind:   In combat, an evil wizard casts Invisibility on himself, walks away from the fray and uses the hide action on his next turn. Since PCs know/assume/deduce he's invisible and certainly in range of the spell, can one use Dispel Magic to end the spell? PCs enter a 80'&times;80' room. Can one declare: "I dispel any Invisibility spell in range", thus revealing one (the closest?) invisible enemy in the room?   What's enough to enable a caster to cast Dispel Magic on a magic effect:    perceiving (seeing, hearing, smelling, etc.) it? knowing/assuming/deducing it's there? or merely suspect/predict it? How to get GUI sudo password prompt without command line? Currently, for all my commands that require root access, I have to type them out on a command line.  I would like for the GUI to prompt me to key in my password, when sudo is required, instead of having to type out the commands from command line.  Is there any way to enable this? Previously one version of Ubuntu desktop had this feature out of the box.  This version of Ubuntu (that I am now running) I upgraded from a server installation.  I will add, my user account is already added to sudo group. Thus I can run commands such as sudo gedit or sudo apt-get but I'm not able to install software in the Ubuntu Software Center. I have a psd that has rounded rectangle. I need to create a new rounded rectangle with the same radius. How do I determine the radius used on that said rounded rectangle?   I feel like this is such an awful question but thanks in advance for answering. I just read a description of CVE-2020-1971, which indicates that a patch was released today for openSSL, the patched version is 1.1.1i -- my version of Ubuntu 20.04.1 LTS is running openSSL version 1.1.1f.  From last March. Software Updater says that my system is up to date.  I am hoping that this openSSL update is released by Canonical by tomorrow... can anyone confirm they are working on this? How to create a label combining different font sizes or types? I would like to place the elevation-number of a point in a different front size and centred under its name:    Is that possible?  (That is my actual labeling: label || '\n' || elevation) I can't work out why Altium is doing this, or how to undo it, or how to make it stop doing it.  It happens when I use the 'Find Similar Objects... ' option; all of objects that it hasn't found are faded out and I can no longer select them.  Anyone know how to fix this?  Additionally, if anyone knows how to change, en masse, the components' footprint library to 'Any' through the SCH inspector, that'd be really helpful too. I have the Nikon kit lens that came with a D5100 — the kit lens is  . I was thinking of getting a fast lens and I am looking to buy the .  Should I consider 35mm or instead buy a 55-200mm for better range? Extracting embedded images from a PDF Before I started using Ubuntu I used Nitro PDF reader to automatically extract images from PDF files. Is there a PDF reader for Linux that does this?  I would like to be able to extract images faster/easier than when taking a snapshot. So I have a torus, and I need it to "telescope" open -- kind of like Pacman's death animation, but with a torus instead of a sphere.  I'm very new to 3D modeling/animating so I really have no clue how to tackle this problem.  Any advice to help me get pointed in the right direction would be most appreciated :) How to install the Boot-Repair tool in an Ubuntu live disc? When the bootloader (GRUB) is broken, I cannot access neither Ubuntu nor Windows.  I heard that an easy solution to fix this is to use the Boot-Repair tool from an Ubuntu liveCD (or liveUSB).  What are the steps to do this? How can I charge my iPhone without waking up my MacBook Pro? Can I run my CPU at 100% usage for a long time? What happens if my ESTA expires on the day of arrival? I'm French and will travel the 14th of June to the US. My ESTA expires the 14th of  June 2013 and I'm wondering if my ESTA will be valid when I'll land in the US on the 14th of June 2013.  Does someone know anything about that? I am trying to identify a sci-fi movie from the 80's or 90's, with the following parameters:  Setting:    Scenes of a red desert planet   Culture:    Either people roam fairly solo and try to acquire resources to survive, or you live in a weird society where if a stranger is captured he needs to play in a game of fight to the death.  Mobility:      One foil character has a giant battle-bot-looking tank as his form of transportation through the desert. Protagonist has a car that has a plastic half bubble on top to look out from.   Robot:      The protagonist runs around in the beginning of the film with a female robot/android whose face is melted off after it has acid touch its face.(This scene happens next to the protagonist's rover)  Love interest:      Somehow protagonist comes across female protagonist in desert. She smells really bad and is hungry. They sleep outside, and he tells her to sleep away from him. He uses a thermal blanket(the first I ever saw in my life). She wakes up next to him, smelling horrible. He bathes her in some water hole they find(as if water were not scarce and they could just waste water.)   Pupa monsters:      Scene where they are in a building and they are trying to get out. They come across a room that is white, in which multiple giant, white, snot, pupa are hanging securely from the ceiling. Through curiosity, they disturb them, and now they have to get out of that room fast.  Boss Antagonist:      Pervert bionic man, that is actually attached to a giant robotic arm, as only form of movement. He is in black and has a pale bald head as his most human looking part. A Hilbert space is, by definition, a complete inner product space. If $(V,|.|)$ is finite dimensional inner product space of dimension $n$ then it is (topologically) isomorphic to $\mathbb{R}^n$ which is of course complete. My instinct here is to say "and therefore, $V$ is also a Hilbert space". I'm not sure about this step however since completeness depends on the norm and the norm depends on the selected inner product (assuming the induced norm $||x|| = (x | x)^{1/2}$ is used). So, must we place some condition on the inner product or is the topological isomorphism between $\mathbb{R}^n$ enough to guarantee that V is Hilbert? Find an example of a function sum $\sum_{n=1}^\infty u_n $ that converges   uniformly on $[a,b]$ and converges absolutely pointwise, but   $\sum_{n=1}^\infty |u_n| $ doesn't converge uniformly on $[a,b]$.   This seems pretty straightfoawrd but it's really hard to find an example. The choice of $u_n$ must be very specific. You can actually prove any power series wont work (due to Abel's theorem)  In addition, in order to prove the uniform convergence, $u_n$ must not satisfy Weierstrass' M-Test (because then $\sum |u_n|$ would converge uniformly aswell) What is the cause of this sudden drop in CV queue size? At Sat, 30 Nov 2013 14:51:01 GMT, there was a sudden drop in the close votes review queue size from 98932 to 98314. This is about 600 questions over the course of one minute.  It doesn't seem like a routine cleanup script. If it was, this is a very odd time for it to run. Also, the drop occurred over the span of a minute, so it's highly unlikely there was simply increased review activity. So, I ask: What was its cause?         (yes please don't shoot me I know my freehand circle is blue) (it's actually a dark teal look again) (the source for this script I  (slightly modified), found through  post)  Raw data:  Epoch time  CV Size 1385822821  98932 1385822881  98932 1385822941  98932 1385823001  98932 *** 1385823061  98932 *** 1385823121  98314     [author's note: the difference between iterations is 60 seconds] 1385823181  98314 1385823241  98314 1385823301  98314 1385823361  98314 I couldn't find much on the new Lucene-based search, and don't know much about the engine in general, so I'm asking this question.  Does anybody have a description of how search results are ranked?  Does the rank calculation include:   rep of post's author? views? unique referers? PageRank of referers? rank of questions that link to the post? whether a question is closed? vote count? answer count?