I’m currently making an app for Android devices and I would like to know how can I change the way I display the fragments in differents display sizes (ex. Tablet). At this point I have an activity for all my fragments and this causes me to replace the fragments when I change page but for tablets I would…
What version of Java is “1.8.0_191” on my Ubuntu install?
On of our (remote) developers needs to install FDT (an Eclipse based IDE) to compile some legacy ActionScript code. I’ve got FDT working on my Ubuntu 18.04 laptop just fine, but the dev is having trouble getting it to work on his Mac. When he has Java version 7, 8 or 9 installed he gets a message saying…
Spring: Check if a classpath resource exists before loading
I have a code where I need to check if a classpath resource exists and apply some actions. Problem: ResourceUtils.getFile() throws FileNotFoundException if the resource doesn’t exist. At the same time I don’t want to use exceptions for code flow and I’d like to check if a resource exists. Qu…
Is there a way to use @OneToMany and @ManyToMany to handle polymorphism in hibernate
I am working on app that uses microservices architecture, i have project A which has this entity User with this code and another entity Authority and i have project B which has entity AAA with this code: so when i run the the project B I get the following error: org.hibernate.AnnotationException: Use of @OneT…
Breakpoints not working on JSP pages in Eclipse
Breakpoints are being hit in the Java code, the project is being run as Debug, “Skip All Breakpoints” is disabled, line breakpoints (blue dots) are on lines in my JSP pages. The result in the web browser debug, so I know it’s hitting the right page: Why are my breakpoints on JSP pages not be…
Count the semiprime numbers in the given range [a..b]
I am solving Codility problem CountSemiprimes: Count the semiprime numbers in the given range [a..b]. Task description A prime is a positive integer X that has exactly two distinct divisors: 1 and X. The first few prime integers are 2, 3, 5, 7, 11 and 13. A semiprime is a natural number that is the product of…
How to execute shell command using SFTP channel in JSch?
I am trying to list all *.xml files in the directory. I do a cd first and then was trying to execute: But not sure how exactly to do it. There were some example around the Exec channel but is there a way to do the find with SFTP itself? Answer Your requirements are conflicting. You cannot execute shell comman…
How to get the value from system property in spring boot
I am using following command to run my spring boot application Currently, I am able to access it via following command like below However I need to access it via any annotation in Spring something like @value(${library.system.property}) I tried to use But the value of the property is null. Do I need to use co…
SQLite: select from column by month
I am trying to sum a tablecolumn on basis of month but I got the following exception: the function the table In the debugger the cursor contains one item but when calling getInt(..) the app crashes Answer The column created for this result: is not called Total. Change the sql statement to this: This way you g…
Knight tour problem – order of moves affect performance
I was trying to implement a solution for knight tour problem. I faced an interesting issue. I would like to know the reason for the behavior. This is the code – it works fine. Now we could run this, starting with knight position as (2, 2) in the matrix When i tried to run the starting position as (0, 0)