To add values to a Java List there are numerous ways. We will discuss it one by one in detail. Insert elements using the list add method Convert Arrays to List Get input from other sources and add it to list Add values using Arrays.asList Add Elements to the List Elements are added to the
Java 8 toMap duplicate key
In List to Map conversion, we will see how to maintain unique keys. Sometimes when you use a key other than the primary key it is possible that there might be duplicate records. In those cases, you will get a Duplicate key IllegalStateException. In toMap method we can pass key and value pairs as arguments.
Convert List to Map in Java 8
Converting List to Map in Java 8 is simple compared to previous versions of Java. The conversion is demonstrated with a POJO and a main class. In the main class, the method getCarList() returns a List of Car objects and pass it as an input for the convertListToMap() method. The input can be obtained from
Angular Select Dropdown using Observable
For the Angular Select Dropdown example, let’s begin with creating a component for dropdown. This example is compatible with Angular 8, 9. Create a DropdownComponent component using the command, This will create a dropdown folder under the app folder. The app\dropdown folder will contain the generated files. Basic Dropdown using Reactive forms First, we see
How to install JDK or JRE on windows 10
For running java programs you need a JDK. JDK means Java SE Development Kit or Java Development Kit. The latest version of Java or JDK is 16. We have downloaded Java SE 16.0.2 development kit which is the latest release under the Java SE 16 Platform. Step 1 Download JDK Go to https://www.oracle.com/in/java/technologies/javase-downloads.html. Download JDK