Is My Sun Java certification still valid?
Your Sun Java certification is still valid, but it has been replaced with the Oracle Certified Professional, Java SE 8 Programmer certification. The Sun certification is no longer supported, so you should consider updating your certification.
How to pull distinct values from an array in Java?
You can use the Collection.Stream API in Java 8 and use the distinct() method to create a new Stream instance with unique elements.
For example if you have a List of Strings // list
List<String> list = Arrays.asList("a", "b", "c", "c", "d");
// Getting the distinct elements in a list
List<String> distinctElements = list.stream().distinct().collect(Collectors.toList());
// Printing distinct elements
This will output:
What is the JDBC package in Java?
The JDBC (Java Database Connectivity) API is a Java API that enables Java applications to access and manipulate data that is stored in relational databases. The JDBC API provides a set of Java interfaces and classes for establishing connections to databases, executing queries, and retrieving results. The JDBC API is part of the Java platform and is included in the standard Java Development Kit (JDK).
Is Java a hard language to learn?
No, Java is generally considered to be quite easy to learn. It is a high-level, object-oriented language that is very organized and syntax-friendly, which makes it a great language to learn for beginners.
What are static variables and methods in Java?
Static variables and methods are variables and methods that are used as part of a class but not associated with any instance of the class. They are usually shared by all instances of the class and can be accessed without creating an instance of the class. Static methods are generally used for operations that do not need to access any instance data or methods of the class and its quite convenient to use them as a part of the class itself.
What is Java EE (enterprise application framework)?
Java EE (formerly known as J2EE) is a Java Platform, Enterprise Edition that provides an API and runtime environment for developing and running enterprise Java applications. It is a service-oriented architecture for building distributed enterprise applications. Java EE includes a set of specifications for enterprise components such as Enterprise JavaBeans (EJBs), JavaServer Pages (JSPs) and servlets, Java Message Service (JMS), Java Transaction API (JTA), and much more. With these components, developers can create sophisticated enterprise applications that can access and interact with other services and applications, often across multiple networks.
This will take the user to the designated URL. You can also use the window.location.replace method to redirect the user to the specified URL. This method takes precedence over the previous link when the user navigates back to the original page. For example: