There are actually many good reasons to consider using accessors rather than directly exposing fields of a class – beyond just the argument of encapsulation and making future changes easier. Here are the some of the reasons I am aware of: Encapsulation of behavior associated with getting or setting the property – this allows additional functionality (like validation) … Read more
I need to convert a certain JSON string to a Java object. I am using Jackson for JSON handling. I have no control over the input JSON (I read from a web service). This is my input JSON: Here is a simplified use case: My entity class is: My Wrapper class is basically a container … Read more
Deletion of a topic has been supported since 0.8.2.x version. You have to enable topic deletion (setting delete.topic.enable to true) on all brokers first. Note: Ever since 1.0.x, the functionality being stable, delete.topic.enable is by default true. Follow this step by step process for manual deletion of topics Stop Kafka server Delete the topic directory, … Read more
Take a look into JavaDocs of deprecated classes: Is there also a replacement for TestRestTemplate()? Yes, here it is:
If this class is only a utility class, you should make the class final and define a private constructor: This prevents the default parameter-less constructor from being used elsewhere in your code. Additionally, you can make the class final, so that it can’t be extended in subclasses, which is a best practice for utility classes. … Read more
I’m pretty sure the classpath and the shared library search path have little to do with each other. According to The JNI Book (which admittedly is old), on Windows if you do not use the java.library.path system property, the DLL needs to be in the current working directory or in a directory listed in the Windows PATH environment variable. Update: Looks … Read more
Explanation: The outer for loop should be clear; it is executed n times. Now to the inner loop. In the inner loop, you take n and always divide it by 2. So, you ask yourself: How many times can I divide n by 2? It turns out that this is O (log n). In fact, the base of log is 2, but in Big-O notation, we remove … Read more
It’s also possible that the specific issue you’re having isn’t a FileNotFoundException. By using the “Exception” in a catch block (which is the parent class to all Exceptions) this is effectively a “catch all”, since it will run if there is an `Exception or any of its subclasses thrown. Try the following change: This will … Read more
I don’t know what you want to do, but this is how I actually translated your example code…. Alternatively, you can create a getter method for text. You can now do Strings.STRING_ONE.toString();