docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
2026-07-05 00:10:59 +09:00
parent a397bc4720
commit 1cfd3bbb56
1495 changed files with 68534 additions and 27 deletions
@@ -0,0 +1,75 @@
+---
+id: java-files-create
+title: "Java Files Create"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["createNewFile()", "자바 파일 생성"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["java", "programming", "w3schools", "files", "io", "create"]
+raw_sources: ["https://www.w3schools.com/java/java_files_create.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Java Files Create]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`createNewFile()` returns `false` (not an exception) when the file already exists — only genuine I/O failures throw `IOException` — so checking the boolean return value, not just wrapping in try/catch, is how you distinguish "already exists" from "created successfully". [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`createNewFile()`** — returns `true` if created, `false` if the file already exists. [S1]
+- **Must be wrapped in try/catch** — throws `IOException` if the file cannot be created for other reasons. [S1]
+- **Empty file only** — creates a file with no content; writing content is a separate chapter. [S1]
+- **Path escaping** — Windows paths need double backslashes (`"C:\\Users\\MyName\\filename.txt"`); Mac/Linux use plain forward-slash paths. [S1]
+
+## 📖 세부 내용 (Details)
+- Create with result check: `try { File myObj = new File("filename.txt"); if (myObj.createNewFile()) { System.out.println("File created: " + myObj.getName()); } else { System.out.println("File already exists."); } } catch (IOException e) { System.out.println("An error occurred."); e.printStackTrace(); }`. [S1]
+- Specific folder (Windows escaping): `File myObj = new File("C:\\Users\\MyName\\filename.txt");`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 파일 존재 여부를 boolean 반환값으로 구분하는 패턴이 이후 Write 챕터로 이어진다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Creating a file with existence check (Java):
+```java
+try {
+    File myObj = new File("filename.txt");
+    if (myObj.createNewFile()) {
+        System.out.println("File created: " + myObj.getName());
+    } else {
+        System.out.println("File already exists.");
+    }
+} catch (IOException e) {
+    System.out.println("An error occurred.");
+    e.printStackTrace();
+}
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Java Tutorial]]
+- **관련 개념:** [[Java Files]], [[Java Files Write]], [[Java Try Catch]]
+- **참조 맥락:** 빈 파일 생성 — 내용을 쓰는 Write 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Java Create Files — https://www.w3schools.com/java/java_files_create.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Java Create Files" page (Astra wiki-curation, P-Reinforce v3.1 format).