Lakeheart Retreat

Lakeheart Retreat

= A peaceful corner of the mind =

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issyuu

Quiet waters, shimmering Lakeheart Retreat; thoughts and daily musings woven by the peaceful waterside.

Posts

Tech

2025-12-01

11500 words

All 15 JEPs of Java 21 (LTS), explained with runnable samples and their real output. Virtual threads, scoped values and structured concurrency are examined with measurements, and each feature's later changes up to JDK 27 are summarized.

Tech

2025-10-01

7630 words

All 14 JEPs of Java 17 (LTS), explained with runnable samples and their real output. The focus is on sealed classes, pattern matching for switch, the new random number API and strong encapsulation. It also covers the Java 12-16 features you get when moving from Java 11, and each feature's later changes up to JDK 26.

Summary

2025-02-10

34807 words

A comprehensive PgMP practice exam with multiple-choice questions, detailed answer keys, and strategic analysis to help you pass the Program Management Professional certification.

Summary

2024-12-25

380 words

プロジェクト管理で使われる英語用語と日本語用語の対訳・対照を網羅した、実務に役立つ単語辞書。

Musing

2024-12-16

3112 words

2025年正月の過ごし方、新年の抱負、家族との団らん、そして一年の始まりにおける決意を綴った日記。

Musing

2024-11-05

681 words

秋の京都における紅葉の名所を巡り、歴史ある寺社と鮮やかな自然が織りなす美しさを体験した紅葉狩り紀行。

Musing

2024-11-01

859 words

和歌山県高野山の霊場を訪れ、その厳かな歴史と宿坊での修行体験、自然の静寂に触れた旅の記録。

Musing

2024-09-09

142 words

農業-農薬

日本語

農業における安全かつ効率的な農薬使用方法、希釈倍率の計算、および適用防除に関する実践的なガイド。

Musing

2024-09-09

155 words

農業-支援政策: 新規就農者や小規模農業経営者が活用できる公的支援制度、補助金、および申請手続きに関する概要。

Musing

2024-07-09

40 words

トマト栽培で発生しやすい主要な病害虫(アブラムシ、うどんこ病など)の特定と効果的な予防・駆除方法。

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