i want to check and give condition to my edittext, if i input something to my edittext, l it will change my imageview, this is my code: i have problem here, my imageview not change…. is this code has true or not? Answer If I read your post correctly, you want to check if the EditText is ever empty as
Security Framework for Java Swing Applications
Is there a security Framework available for Java Desktop Applications? When I searched on google I saw persons talking about Spring Security, however it seems to be chiefly web-based. I have been using ordinary java code(Login forms, jdbc) to implement User Level security but I am not comfortable programming …
How to avoid NullPointerExceptions from boxed type arithmetic in Java?
Given the following: The requirement for my use case is that result should be null whenever either operand is null (and the same applies for other operators). I know I can use an if statement to do this but is there a smarter way? Answer The best way is not to use Boxed types for normal arithmetic operations.…
How to get all the dates in a month using calender class?
Here I want to display dates like I can get total days in a month Does anyone have an idea to help me? Answer If you only want to get the max number of days in a month you can do the following. If you actually want to print every day then you can just set the day of month
404 error when referencing fileUpload interceptor in Struts 2
I am using struts.xml file which is described below : It was working before I added the last action upload. When I start the server it is showing me the 404 error. Can somebody help me out in resolving the issue. I am feeling that the issue is due to <interceptor-ref name=”fileUpload”>. Answ…
If without else ternary operator
So far from I have been searching through the net, the statement always have if and else condition such as a ? b : c. I would like to know whether the if ternary statement can be used without else. Assuming i have the following code, i wish to close the PreparedStatement if it is not null (I am using
Override generic method with more narrow parametrization
What I have: I have a generic method which I want to override: What I want: There will be few classes that extend C-class and narrow parametrization. Example: Question: How can I achieve that? EDIT: Class C has many heirs: D, F, G, H… Each of those classes has the single method f(T param). And for each …
Java Array of unique randomly generated integers
I have a method above which should generate an array of random elements that the user specifies. The randomly generated integers should be between 0 and 10 inclusive. I am able to generate random integers but the problem I have is checking for uniqueness. My attempt to check for uniqueness is in my code above…
Running jacocoReport
I’m using Gradle 1.7 and Jacoco plugin. My project uses Java and Scala plugins. When I run gradlew -i clean jacocoTestReport Report is not created and I see in the log What does it mean? Why report is not created? Answer The task will only run if coverage data is available. You can make sure of that by …
Where is the best place to begin transaction using Hibernate in a tired web application with Struts 2?
I got this Java web application which uses Struts 2 and Hibernate. In the most upper layer comprises of the Struts 2 action classes. Then there are my business logic classes which are responsible for the logic of the application. Finally there is a DAO layer (called Database Bridge) which is responsible for c…