My question is very simple but I still cannot find out what’s the problem. When I input java, java -version or javac -version in a command prompt nothing is shown at all: neither an “unknown file” error nor the result. That’s how it looks like: I used standard Java installer, PATH and …
Tag: java
how to get all the apps that can open file to arrayList
how i can get all the apps that can open file to ArrayList? i am using this code to open file:- preview Answer intead of calling startActivity just use queryIntentActivities you can also try with MATCH_ALL flag or whatever you need. more to inspect in DOC
Kafka Streams: SerializationException: Size of data received by LongDeserializer is not 8
I have a small app to count the number of colors using Apache Kafka – The topics are created and producers/ consumers are started using the terminal: I provided the following inputs into the terminal: I received the error in the consumer terminal: What’s the issue here? I did brief research and fi…
Filtering out formatting tags from JSoup selectors
JSoup here. I have the following HTML I’m trying to parse: Unfortunately its actually slightly malformed (missing some closing tags, opening and closing tags on <b> and <u> are out of order, etc.) but I’m hoping JSoup can handle that. I don’t have control over the HTML. I have th…
How to make a custom-shaped Recycler View?
I need to make a recycler view whose elements will wrap around the ImageView (like this: https://imgur.com/a/7NpCHri). Is there a way to implement this? Answer You can create adapter with GridLayoutManager and for items with indexes 6, 7, 10, 11 make empty transparent views. But as it were said in comment it …
how to specify nominal attribute value’s order when converting csv file into arff file?
I’m trying to convert a csv file into an arff file using the following code. This code works, but the problem is the following. In my attributes list, I have a nominal attribute with values {yes, no} and i need that the arff header shows as first value yes. To be clearer, I need @attribute nominal_attr …
Current time API / Exact time detection via API
Today, for the first time, I am trying to get the right time through the API. I don’t understand‚ please help. I am using the http://worldtimeapi.org/api/timezone/ site to determine the exact time. But I didn’t understand how to use it in JAVA and what codes to write. Please send me a snippet of code or…
NullPointerException: Cannot invoke “Object.toString()” because the return value of “javax.swing.JButton.getIcon()” is null
Im trying to make a tictactoe blackout game where you have to fill everything with a specific icon. everything is doing well but the problem im having is when checking if the player has won by I even tried this and have the same error This is how i initialized my buttons This is the error that is showing Than…
Is it possible to return the Class of a generic type without any warning?
The question is pretty simple, take a look at the following code: In eclipse and maybe other ide, a warning is generated: So i did change the return type of the getApplicableClass function to: But the question now is, how can i return a Class<ChoiceBox<?>> without warning Answer This case is expli…
cannot resolve ‘@GET’ [closed]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 1 y…