[Solved] Remove all chars in java string, except ‘0’ and ‘1’ [closed]
you can use regex and replaceAll method String out = str.replaceAll(“[^01]”, “”); 0 solved Remove all chars in java string, except ‘0’ and ‘1’ [closed]
java
[Solved] Please help me understand Arrays [closed]
first part double[] arr=new double[50]; for(int i=0;i<25;i++) arr[i]=i*i; second part for(int i=25;i<arr.length;i++) arr[i]=3*i; third part for(int i=0;i<arr.length;i++) { if((i%10==0)&&i!=0) System.out.println(arr[i]+” “); else System.out.print(arr[i]+” “); } I’m not sure if i understood you but the first part is the squared index, the second is the double index, the third is printing the array, notice that after … Read more
[Solved] which should i use in request.getParameter in servlet? [duplicate]
You have to address the name Attribute of your input Elements Serverside. So if you would have <input type=”text” name=”username” id=”userelementid”> then you would still use request.getParameter(“username”) 0 solved which should i use in request.getParameter in servlet? [duplicate]
[Solved] resources to make java card application similiar like RB 5.0 [closed]
Smart card specifications: Global Platform Card Specification (This is v 2.2.0.7, your card may was compatible a lower version) ISO/IEC 7816 (Regularly you need part 3 and 4) Java Card applet development kit (including API Specifications + RE and VM Specification): Java Card Development Kit 3.0.2 (Download the version that is compatible with your card) … Read more
[Solved] Java graphs not appearing
I have learned that extending JFrame and JPanel is bad But if you need to draw in the GUI, you often need to extend JPanel, and that’s exactly what you should do here. For example the code where you draw with a Graphics object should be inside of the JPanel’s protected void paintComponent(Graphics g) method. … Read more
[Solved] Java/Android – Best way to update apps that are not in the Play Store
You have multiple misconceptions how updating, APKs and keeping keys secure work. You have to host your APKs somewhere. Github releases is a pretty common way (but slow), but you could also use google drive, dropbox or your own server. Your app has to fetch the server regularly and check if a new APK is … Read more
[Solved] Android background default when pressed object [closed]
Create a ripple_effect.xml file and add following code. res/drawable/ripple_effect.xml <?xml version=”1.0″ encoding=”utf-8″?> <ripple xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:tools=”http://schemas.android.com/tools” android:color=”#f816a463″ tools:targetApi=”lollipop”> <item android:id=”@android:id/mask”> <shape android:shape=”rectangle”> <solid android:color=”#f816a463″ /> </shape> </item> </ripple> see the link : http://www.viralandroid.com/2015/09/how-to-add-ripple-effect-to-android-button.html implement it in your code where you want to add effect. solved Android background default when pressed object [closed]
[Solved] Android App which not removes even after System reset
When factory reset occurs, it deletes all user apps and preferences but leaves all system apps. When there is an update of the rom, it writes the system partition, having root privileges. So there are two possibilities: with root privileges, install the app as a system app or build the rom with the app included. … Read more
[Solved] Turning a for loop to recursive method for prime numbers
One of my schoolmates’ topic accually recieve a solution here it is if you interested its quite brilliant https://stackoverflow.com/questions/35660562/finding-prime-numbers-recursively-with-using-only-one-parameter?noredirect=1#comment59001671_35660562 solved Turning a for loop to recursive method for prime numbers
[Solved] how to do substring of HttpResponse in android
You can simply do this, String yourString = yourResponse.substring(yourResponse.lastIndexOf(‘#’) + 1); 1 solved how to do substring of HttpResponse in android
[Solved] How to insert whitespaces before and after a word or character?
You can try this: String str = “SerbiaandEuropetheAmerica”; str = str.replaceAll(“the”, ” the “); str = str.replaceAll(“and”, ” and “); System.out.println(“str = ” + str); It is the result: str = Serbia and Europe the America 3 solved How to insert whitespaces before and after a word or character?
[Solved] Arrays class is not identified [closed]
It is issue with eclipse version. Answer from user @Andreas Helios (3.6) is from June 23, 2010, and is far from the latest, and it doesn’t support Java 8. Luna (4.4) from June 25, 2014 is the first version with integrated Java 8 support. Latest version is Mars (4.5) from June 24, 2015. Thanks to … Read more
[Solved] Cannot run Java Runtime.exec() on Opensuse
So far so good! I found the answer recently by myself, still don’t have a reason why it works this way, but I suppose it’s all about internal difference of handling new processes in VM’s on different platforms. I had to edit the code this way, and now it works: String[] runcmd = {“java”,”-jar”,”/home/user/jar.jar”}; Runtime.getRuntime().exec(runcmd); … Read more
[Solved] A_Class cannot be cast to B_Class?
Your class hierarchy is: class Home_Page extends AppCompatActivity class MainActivity extends AppCompatActivity This is similar to the following: class Dog extends Animal class Cat extends Animal You can cast a Dog to an Animal, but you can’t cast a Dog to a Cat. In the same way, you can’t cast a Home_Page to a MainActivity. … Read more
[Solved] Null Pointer Exception on SimpleDateFormat parse [duplicate]
String dateStr = “04/05/2010”; SimpleDateFormat curFormater = new SimpleDateFormat(“dd/MM/yyyy”); try { dateObj = curFormater.parse(dateStr); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } SimpleDateFormat postFormater = new SimpleDateFormat(“MMMM dd, yyyy”); String newDateStr = postFormater.format(dateObj); Toast.makeText(getApplicationContext(), newDateStr, 1).show(); 1 solved Null Pointer Exception on SimpleDateFormat parse [duplicate]