I am developing stomp+WebSocket using Intellij Idea. Now I need to know: how to search string from Intellij Idea global? For example, I got this error: And I go to class WebSocketAnnotationMethodMessageHandler in spring-websocket.jar(Maven’s jar) and find nothing about this string:No matching methods or…
expression evaluation using stack in java
My program is working with expression like 12 + 3 * 45.But Its not working expression like 12*4+(7/2). please give correction in my code.I am attaching my code: Answer Let’s take a look at your block which parses digits: Let’s assume our tokens are {‘1’, ‘+’, ‘2’…
Logback conversion rule parametrizing
Is there any way of parametrizing conversion rule in Logback? I’ve tried adding child nodes, additional attributes and I don’t see a way to do it. I would like to add parameter that will be used by LongMessageConverter class. My application is setup on Spring Boot and I am using Sl4J. Answer This …
The Properties.load would close the InputStream?
I saw this example, and I didn’t see the close() method invoked on the InputStream, so would prop.load() close the stream automatically? Or is there a bug in the example? Answer The Stream is not closed after Properties.load () The above code returns “-1” so the stream is not closed. Otherwi…
How to find the longest string object in an arrayList
Here is is my problem, I have to explain a lot, because it’s a quite complicated. I have created an arrayList<Word>, that contains strings as objects. In my case, I have three classes, all working together, that is supposed to represent a dictionary. The first class is called “Word”, i…
Why does MockMvc always return empty content()?
I’m trying to test my rest api with mockMvc. The test failed because of: From the output of print(), I can know the API actually returned the expected string “iPhone”. And I guess the empty “Actual” above is caused by empty “Body” below My questions are: Why MockHttpS…
Error creating bean with name ‘entityManagerFactory’ defined in class path resource : Invocation of init method failed
When I compile my spring project, I got the following error. Error creating bean with name ‘entityManagerFactory’ defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed I am using STS Eclipse and MySql D…
Spring boot and Thymeleaf – Hot swap templates and resources once again
I tried all tips and tricks that I found here and in docs, but still no luck. I have Spring webapp with Thymeleaf. Resources and templates are not reloaded when I call update in IDEA (it says nothing to reload). I can then press ctrl+f5 in a browser like crazy, changes are just not there. Everything is config…
What is a StringIndexOutOfBoundsException? How can I fix it?
This is my code: It’s the default given from the android documentation. I only changed the url. This is my error message: java.lang.StringIndexOutOfBoundsException: length=28; regionStart=1; regionLength=499 at java.lang.String.substring(String.java:1931) at com.example.my.app.MainActivity$2.onResponse(…
Is it possible to use Color Hex in JLabel like #02f7fc?
Is it possible to use Color hex in JLabel such as #02f7fc? I want to use A-F colors. Using label.setForeground(Color.(BLUE/RED/BLACK/…); is so boring. Answer The following should allow you to set the colour using hex with the use of the decode method.