docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

10_Wiki/Topic_Programming/Topic_Java/Java_Errors.md

@@ -0,0 +1,72 @@
+---
+id: java-errors
+title: "Java Errors"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["자바 에러 유형"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["java", "programming", "w3schools", "errors"]
+raw_sources: ["https://www.w3schools.com/java/java_errors.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Errors]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Logical errors are explicitly called "hardest to find" because the program compiles AND runs without crashing — it just produces wrong results (e.g., `x - y` instead of `x + y`), meaning no error message points you to the bug; only testing against expected output reveals it. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Compile-time error** — detected by the compiler, prevents the code from running (syntax/type issues). [S1]
+- **Runtime error** — occurs while running, often causes crashes (e.g., division by zero, out-of-bounds access). [S1]
+- **Logical error** — code runs and produces output, but the output is wrong; hardest category to detect. [S1]
+- **Good habits** — meaningful variable names, reading error messages for line numbers, checking for missing semicolons/braces, watching for typos. [S1]
+
+## 📖 세부 내용 (Details)
+- Missing semicolon: `int x = 5 System.out.println(x); // error: ';' expected`. [S1]
+- Undeclared variable: `System.out.println(myVar); // cannot find symbol: variable myVar`. [S1]
+- Mismatched types: `int x = "Hello"; // incompatible types: String cannot be converted to int`. [S1]
+- Division by zero: `int x = 10; int y = 0; int result = x / y; // ArithmeticException: / by zero`. [S1]
+- Array out of bounds: `int[] numbers = {1, 2, 3}; System.out.println(numbers[8]); // ArrayIndexOutOfBoundsException`. [S1]
+- Logical error: `int sum = x - y;` when addition was intended — no exception thrown, just wrong output. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 세 가지 에러 유형 분류는 이후 디버깅/예외 처리 챕터의 기초 개념이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Logical error — code runs but result is wrong (Java):
+```java
+int x = 10;
+int y = 2;
+int sum = x - y;  // mistakenly subtracts instead of adds
+System.out.println("x + y = " + sum);  // "x + y = 8" (expected 12)
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.90
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Java Tutorial]]
+- **관련 개념:** [[Java Debugging]], [[Java Try Catch]]
+- **참조 맥락:** 에러 유형 분류(컴파일/런타임/논리) — 디버깅 챕터로 직접 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Errors — https://www.w3schools.com/java/java_errors.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Errors" page (Astra wiki-curation, P-Reinforce v3.1 format).