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[Java] Still stuck on for-loops? How to write modern, 'post-beginner' code using the Stream API

When processing data in arrays or lists, do you just reach for a for-loop (or enhanced for-loop) by default? When learning Java, the first thing that comes to mind when extracting data with specific ...
GitHub

Ex11-Convert HashSet to ArrayList .md

Ex14-First Unique Number in a Stream.md Ex15-Value Existence Check in a TreeMap.md DS_JAVA_MODULE-08 / Ex11-Convert HashSet to ArrayList .md yuvaram444 Update Ex11-Convert HashSet to ArrayList .md ...
GitHub

Ex13-Elements of an Array.md

/* Program to FILL the first 10 elements of an array with a constant value using the Arrays.fill() method. Developed by: Yuvaram S RegisterNumber: 212224230315 */ import java.util.*; public class ...
blog.csdn

JSON转Excel的前后端协同导出方案：Java POI + 前端Blob下载

JSON转Excel是企业级Web系统中高频但易出错的数据导出场景，其本质是将结构化JSON数据按Excel语义（行列、样式、类型、编码）进行保真映射。技术原理涉及JSON扁平化处理、流式内存控制（如SXSSFWorkbook）、前端Blob流式下载与进度反馈等关键环节。该方案兼顾大数据量下的稳定性与小数据量下的响应 ...