58 posts tagged with "java"

A discussion system usually needs to represent a top-level comment, its replies, and the user being replied to.

Reading a file line by line is appropriate for logs and other large text files because it avoids loading the complete file into memory. Always specify the character set and close streams reliably.

A Java web server can inspect HTTP headers such as User-Agent to estimate the browser, operating system, and device category. The result is heuristic, not a trustworthy device identity.

An <audio> element can play a normal HTTP resource, but seeking and reliable playback depend on correct response headers and byte-range support.

A basic image CAPTCHA generates a random challenge, stores its expected value on the server, draws the characters into an image, and returns the image with no-cache headers.

UEditor consists of a browser editor and a server-side action endpoint used for configuration, uploads, image listing, and related operations.

Java's standard library supports conversions between bases 2 and 36. Digits 0–9 represent values zero through nine, while letters a–z represent values ten through thirty-five.

This article reviews the 2012 Lanqiao Cup Java vocational-group problems and the programming techniques commonly required to solve them.