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_Debugging.md

@@ -0,0 +1,71 @@
+---
+id: java-debugging
+title: "Java Debugging"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["자바 디버깅"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.87
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["java", "programming", "w3schools", "debugging"]
+raw_sources: ["https://www.w3schools.com/java/java_debugging.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Debugging]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Print-statement debugging doubles as a crash locator — placing `println` calls before and after a suspect line (like a division) reveals exactly which line crashed, since the source shows "Before division" printing successfully while the line after the crash never executes at all. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Debugging** — identifying and fixing errors/bugs; involves reading error messages, tracing variable values, testing code in isolation. [S1]
+- **Print-statement debugging** — the most basic technique: `System.out.println()` to check values and program flow. [S1]
+- **Bracketing suspect code** — print before AND after a risky line to isolate exactly where a crash happens. [S1]
+- **Variable-value checking** — print variable values to verify conditions behave as expected. [S1]
+- **IDE debuggers** — breakpoints, step-through execution, real-time variable inspection (IntelliJ, Eclipse, NetBeans). [S1]
+- **Debugging checklist** — read full error messages, check variable initialization, print to trace, watch for off-by-one errors, comment out code sections to isolate bugs. [S1]
+
+## 📖 세부 내용 (Details)
+- Crash isolation via print bracketing: `System.out.println("Before division"); int result = x / y; System.out.println("Result: " + result); // never runs`. [S1]
+- Condition verification: `int age = 17; System.out.println("Age: " + age); if (age >= 18) {...} else {...}` — test by changing age to 18/19 and observing output. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — print 문으로 크래시 지점을 특정하는 기법은 예외 처리(Try Catch) 학습 전 단계의 기초 디버깅 방법이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Bracketing a suspect line with print statements to locate a crash (Java):
+```java
+int x = 10;
+int y = 0;
+System.out.println("Before division"); // prints
+int result = x / y;                    // crashes here
+System.out.println("Result: " + result); // never runs
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.87
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Java Tutorial]]
+- **관련 개념:** [[Java Errors]], [[Java Try Catch]]
+- **참조 맥락:** 에러 발견 후 디버깅 기법 — 예외 처리(try-catch) 챕터로 직접 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Debugging — https://www.w3schools.com/java/java_debugging.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Debugging" page (Astra wiki-curation, P-Reinforce v3.1 format).