Problem : I’m getting below error. Failed to parse JSON due to: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at […]
Category: Java
Extract digits from a string in Java
Problem : I have a Java String object. I need to extract only digits from it. I’ll give an example: […]
JPQL Create new Object In Select Statement – avoid or embrace?
Problem : I’ve learnt recently that it is possible to create new Objects in JPQL statements as follows: select new […]
JavaFX 11: IllegalAccessError when creating Label
Problem : This question is likely about the same issue as this one, but it appears the asker of that […]
JUnit: How to simulate System.in testing?
Problem : I have a Java command-line program. I would like to create JUnit test case to be able to […]
Calculating distance between two points, using latitude longitude?
Problem : Here’s my try, it’s just a snippet of my code: final double RADIUS = 6371.01; double temp = […]
How can I make Java print quotes, like “Hello”?
Problem : How can I make Java print “Hello”? When I type System.out.print(“Hello”); the output will be Hello. What I […]
how to read System environment variable in Spring applicationContext
Problem : How to read the system environment variable in the application context? I want something like : <util:properties id=”dbProperties” […]
Handling MySQL datetimes and timestamps in Java
Problem : In a java application what would a good compromise in terms of extracing and inputting date information with […]
How to terminate Scanner when input is complete?
Problem : public static void main(String[] args) { Scanner scan = new Scanner(System.in); try { while (scan.hasNextLine()){ String line = […]
