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the current transaction isolation level, which will be one of the following constants: Connection.TRANSACTION_READ_UNCOMMITTED, Connection.TRANSACTION_READ_COMMITTED, Connection.TRANSACTION_REPEATABLE_READ, Connection.TRANSACTION_SERIALIZABLE, or Connection.TRANSACTION_NONE.
- Use
Provides the API for server side data source access and...
- PreparedStatement
The JDBC driver will do any necessary conversion from...
- Package
java.sql and javax.sql Features Introduced in the JDBC 4.2...
- Use
- Overview
- Java 8 Stream and Thread Pool
- Decreased Debuggability
- Methods Returning Null Or Optional
- Too Many Functional Interfaces
- Checked Exceptions and Lambda Expressions
- Conclusion
Java 8 introduced some new features, which revolved mostly around the use of lambda expressions. In this quick article, we’re going to take a look at downsides of some of them. And, while this is not a full list, it’s a subjective collection of the most common and popular complaints regarding new features in Java 8.
First of all, Parallel Streams are meant to make easy parallel processing of sequences possible, and that works quite OK for simple scenarios. The Stream uses the default, common ForkJoinPool– splits sequences into smaller chunks and performs operations using multiple threads. However, there is a catch. There’s no good way to specify which ForkJoin...
The new coding style simplifies our source code, yet can cause headaches while debugging it. First of all, let’s look at this simple example: This is a standard imperative Java code that’s self-explanatory. If we pass empty Stringas an input – as a result – the code will throw an exception, and in debug console, we can see: Now, let’s re-write the ...
Optionalwas introduced in Java 8 to provide a type-safe way of expressing optionality. Optional, indicates explicitly that the return value may be not present. Hence, calling a method may return a value, and Optionalis used to wrap that value inside – which turned out to be handy. Unfortunately, because of the Java backward compatibility, we someti...
In the java.util.functionpackage, we have a collection of target types for lambda expressions. We can distinguish and group them as: 1. Consumer– represents an operation that takes some arguments and returns no result 2. Function– represents a function that takes some arguments and produces a result 3. Operator– represents an operation on some type...
Checked exceptions have been a problematic and controversial issue before Java 8 already. Since the arrival of Java 8, the new issue arose. Checked exceptions must be either caught immediately or declared. Since java.util.functionfunctional interfaces do not declare throwing exceptions, code that throws checked exception will fail during compilatio...
In this quick write-up, we discussed some of the downsides of Java 8. While some of them were deliberate design choices made by Java language architects and in many cases there is a workaround or alternative solution; we do need to be aware of their possible problems and limitations.
Jun 26, 2024 · There are a few major Java 8 features mentioned below: Lambda Expressions: Concise functional code using ->. Functional Interfaces: Single-method interfaces. Introduced and Improved APIs: Stream API: Efficient Data Manipulation. Date/Time API: Robust Date and Time Handling.
Jun 19, 2024 · Streams offer a functional approach to processing collections of objects, making code more concise and readable. If you’re preparing for a Java interview, understanding Streams is crucial. Here...
- Chandan Mishra
- forEach() method in Iterable interface. Whenever we need to traverse through a Collection, we need to create an Iterator whose whole purpose is to iterate over, and then we have business logic in a loop for each of the elements in the Collection.
- default and static methods in Interfaces. If you read forEach method details carefully, you will notice that it’s defined in Iterable interface but we know that interfaces can’t have a method body.
- Functional Interfaces and Lambda Expressions. If you notice the above interface code, you will notice @FunctionalInterface annotation. Functional interfaces are a new concept introduced in Java 8.
- Java Stream API for Bulk Data Operations on Collections. A new java.util.stream has been added in Java 8 to perform filter/map/reduce like operations with the collection.
Oct 4, 2024 · This advanced Java tutorial provide you with the essential knowledge and skills to elevate your programming expertise in Java. Dive deeper into advanced concepts, refine your coding techniques, and unlock new possibilities in Java development.
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May 7, 2024 · From nifty lambda expressions for better functions to the Stream API that made working with data easier, Java 8 was a game-changer. We’ll look through the updates up to Java 21, where sealed...
