How do you send byte[] array in retrofit call. I just need to send over byte[]. I get this exception when I have been trying to send a retrofit call. retrofit.RetrofitError: retrofit.converter.ConversionException: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was…
Tag: java
object references an unsaved transient instance – save the transient instance before flushing: com.entity.Role
I’m getting object references an unsaved transient instance – save the transient instance before flushing: com.entity.Role exception while trying to insert some values in table using hibernate related dependencies in pom.xml are Role.java is User.java is I’m using repository as mentioned in …
Installing and using Gradle in a docker image/container
I am getting this strange error at the end of the process of creating a docker image from a Dockerfile: The relevant part of the Dockerfile: The command I am using is: docker build -t java_i . The strange thing is that if: I run a container from the previous image commenting out RUN gradle test jar (command: …
Testing image files with JUnit
I’m looking for direction on how to test that a dynamically generated image is the expected image with JUnit. A bit of background: I have code that generates thumbnail images as java.awt.image.BufferedImage’s and stores those BufferedImages into a java.io.File object. I wrote a simple unit test to…
Generate a Secure Random Password in Java with Minimum Special Character Requirements
How do I create a random password that meets the system’s length and character set requirements in Java? I have to create a random password that is 10-14 characters long and has at least one uppercase, one lowercase, and one special character. Unfortunately, some special characters are too special and c…
Hibernate: New Session without dropping the tables
I am new to Hibernate (implementing since yesterday) and i succesfully created a method, that transfers my Customer Objects to the Database. After i quit my application and start it again and create a new session (in an other method) based on my hibernate.cfg.xml file with this setting: It leads to that point…
Java AWT Window doesn’t get repainted
I’ve derived a class from window, but whenever I call setValue() (which calls repaint) it doesn’t get redrawn (the method is called, but nothing changes on the screen). The first value is drawn, which is 0 by default. Here’s the class: Why does it not get repainted properly? Answer From the …
Selenium logging in Java – best practice? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 7 years ago. Improve this question What are the current best practices for logging selenium webdriver ac…
Guice: Injecting map binding with @Named
I would like to have the following injection model. Is this possible with Guice? Module: Class: Answer That is not what map binder are intended for. In your example a binding annotation would be the way to go: https://github.com/google/guice/wiki/BindingAnnotations
Given n and k, return the kth permutation sequence
The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, We get the following sequence (ie, for n = 3 ) : “123” “132” “213” “231” “312” “321” Given n and k, return the kth p…