2. Merge Two Maps by Combining Values for Duplicate Keys If we want to handle the cases where duplicate keys are present in the maps and we do not want to lose the data for any map and for any key. In this case, we can take the help ofMap.merge()function added inJava 8. Themer...
Tip: There are more ways to merge lists using libraries like guava or Apache commons lang, but they all useaddAll()method only. So it’s better to use this method directly. 1.2. UsingStream.flatMap() Java 8 streams provide us with one-line solutions to most of the problems and at th...
This is a basic way to sort a list in Java, but there’s much more to learn about sorting lists, especially when dealing with custom objects or when you want to sort in a different order. Continue reading for a more detailed understanding and advanced usage scenarios. Table of Contents[hi...
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To convert your certificates to a format that is usable by a Java-based server, you need to extract the certificates and keys from the .pfx file using OpenSSL, and then import the certificates to keystore using keytool. The following steps require keytool, OpenSSL, and a Weblogic-specific ut...
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Once installed, you can begin to define Mongoose “schema” objects, which will define the kind of objects to be stored in the MongoDB collection. Mongoosing a Person Mongoose uses some interesting terminology for what’s essentially a two-step process to defining a JavaScript object model on...
set department_data = json_mergepatch ( department_data, '{ "department" : "Finance and Accounting" }' ) where department_id = 110 ; Of course, as part of this re-org you'll probably need to merge in the Finance employees too. The employees attribute is an array. To patch an arr...
guarantees provided by a given object. In the absence of explicit indication to the contrary, all objects are assumed to be "thread-safe" (i.e., it is permissible for multiple threads to access them concurrently). It is recognized that current specifications don't always live up to this ...
In the absence of explicit indication to the contrary, all objects are assumed to be "thread-safe" (i.e., it is permissible for multiple threads to access them concurrently). It is recognized that current specifications don't always live up to this ideal. Unless otherwise noted, the Java ...