My project shows error message that WakefulBroadcastReceiver cannot be resolved to a type. I looked up for all possible reasons I can think of. I have set android-support-library and google play services’s path. Even my mapView works (if I comment below code) that means google play service is correctly …
Tag: java
Set row height depend on JTextArea height
I have a problem and really don’t know how to solve it. I used some solutions from this forum but they don’t work. This is the piece of code: This is little bit long but rather simple: my table uses custom cell renderer which contains JTextArea. I use JTA because I need Strings wrapping. After put…
Removing Java 8 JDK from Mac
So I installed the beta of JDK 8 a while ago to look at some of the examples. I thought for sure by now, it’s easy to change between versions. Doing some Play development with IntelliJ. For some reason, IntelliJ is compiling with 8 even though: I have the compiler set in Preferences to use 1.6 Supposedl…
Finding second occurrence of a substring in a string in Java
We are given a string, say, “itiswhatitis” and a substring, say, “is”. I need to find the index of ‘i’ when the string “is” occurs a second time in the original string. String.indexOf(“is”) will return 2 in this case. I want the output to be 10 in th…
Java-get most common element in a list
Does Java or Guava have something that will return most common element in a list? [1,3,4,3,4,3,2,3,3,3,3,3] return 3 Answer This is fairly easy to implement yourself: 3 If you want to handle cases where there’s more then one most frequent element, you can scan the list once to determine how many times t…
Can’t find @Nullable inside javax.annotation.*
I want use @Nullable annotation to eliminate NullPointerExceptions. I found some tutorials on the net, I noticed that this annotation comes from the package javax.annotation.Nullable; but when I import it a compilation error is generated: cannot find symbol Answer You need to include a jar that this class exi…
How to use interface to communicate between two activities
I am trying to make listener interface between two activities Act1 and Act2. Act1 will start Act2. If there is some event occurred in Act2, it will inform it to Act1. Problem is that I am starting new activity using Intent, so how Act1 will assign itself as listener to Act2’s interface? Act1.java Act2.j…
How can we use .class on primitive types?
When we say it prints class java.lang.Integer which makes sense because java.lang.Integer is a class. So we can have a corresponding Class object. But when I do it prints int which I felt is kind of ambiguous as .class returns an object of type Class and int is not a class (but a primitive type). What is the …
Save drop-down list value to database in Struts 2 with Hibernate
I want to save the selected value of drop-down list into the database. First index.jsp is loaded. From index.jsp, we can go to register.jsp when we click register URL of index.jsp. struts.xml: index.jsp: register.jsp: Action class is: the drop down list is actually only one of the form fields. there are other…
How do I change the IntelliJ IDEA default JDK?
I use IntelliJ IDEA as my development environment, and Maven for dependency management. I frequently build my project structure (directories, poms, etc) outside of IDEA and then import the project into IDEA using Import project from external model. This works great, except that in my poms I specify that the m…