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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.
Aug 8, 2024 · Deciding the optimal size for a JDBC connection pool is crucial for balancing performance and resource utilization. A small pool might result in faster connection access but could lead to delays if there aren’t enough connections to satisfy all requests.
- Sumit Pal Singh
Jun 21, 2024 · By understanding concepts like socket programming and HTTP connections, you’re equipped to build reliable, efficient networked applications. With Java’s robust APIs and libraries, you can confidently tackle networking challenges and contribute to seamless connectivity in today’s digital landscape.
Dec 12, 2018 · for example, apache http components, arguably the most used HTTP client in java, uses it for literal maximum number of concurrent connections to a single host: https://hc.apache.org/httpcomponents-client-ga/httpclient/xref/org/apache/http/impl/client/HttpClientBuilder.html#L1005. answered Dec 30, 2020 at 4:27.
Nov 17, 2023 · In this blog post, we will walk through the steps of setting up a simple CRUD (create, read, update, delete) operation using JD. JDBC (Java Database Connectivity) is a standard API (application interface) between the java programming language and various databases like Oracle, SQL, PostgreSQL, etc.
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Through the classes in java.net, Java programs can use TCP or UDP to communicate over the Internet. The URL , URLConnection , Socket , and ServerSocket classes all use TCP to communicate over the network.
