Web 0.14.1: Wie Java auf jedem Computer läuft (Compiler, Bytecode, JVM, JDK/JRE)

CHANGELOG.md

@@ -15,6 +15,7 @@ The format is loosely inspired by Keep a Changelog.
 
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+- **Web 0.14.1, how Java runs on every computer:** lesson 20 has a new step „Wie Java auf jedem Computer läuft“ after „Snippet oder Class“: source code → compiler `javac` → bytecode (`.class`) → JVM on Windows/macOS/Linux, platform independence („Write once, run anywhere“), the JVM pictured as a small computer made of software (but a virtual machine, not an operating system), a table JRE vs. JDK, the JVM translating bytecode into machine code (JIT compiler), and a comparison with C++ (compiled directly to machine code, so once per system; second diagram l20-cpp.svg and a C++/Java table). New self-drawn diagram l20-jvm.svg (de/en/pt), the CAFEBABE Angeberwissen moved into the new step, three competences, three checklist lines and three quiz questions. Lesson 4 „Jetzt in Java“ points to lesson 20. New glossary entries Quellcode, Compiler, Bytecode, Maschinencode, JIT-Compiler, JVM, JRE, JDK, plattformunabhängig and Nachschlagen section „Java › Vom Code zum Programm“ (de/en/pt).
 - **Web 0.14.0, new world VisuFlow: draw flowcharts:** fourth world next to VisuStruct, VisuBot and VisuObject (…/app/?visuflow, colour violet, chosen at the start or in the gear menu; the world chooser now has two rows). Only drawing, no simulation and no code: drag the DIN 66001 symbols (Start, Anweisung, Ein-/Ausgabe, Verzweigung, Unterprogramm, Ende) from the bar onto the canvas, or tap a symbol to add it below the selected one, joined by an arrow; type the text right in the symbol (tap again or double click to change it). Drag an arrow from the dot at an exit to the next symbol; the diamond has the exits ja and nein (button „ja/nein tauschen“ swaps their sides), arrows run at right angles, loops go around on the right. Move with the mouse, finger or arrow keys on a 20 px grid, delete, undo/redo, title above the canvas, example „Tee kochen“ from lesson 1. Save and open as `.visuflow` file (the last plan stays in the browser), export as PNG, SVG or PDF (A4). Texts de/en/pt.
 - **Web 0.13.38, comments in Java:** lesson 6 has a new step „Kommentare im Code“ after „Jetzt in Java“: single-line `//` and multi-line `/* … */` comments, Java skips them and the structure chart stays the same; Javadoc `/** … */` is only mentioned. The IPO example (with „Im Editor öffnen“) shows the task in a multi-line comment, `// Eingabe`, `// Verarbeitung`, `// Ausgabe`, an explanation after a line, the expected output and a note for next time; plus a fill-in-the-gaps exercise, an Angeberwissen (PL/I 1964, BCPL 1967), a competence, a checklist line and two quiz questions. Lesson 14 marks closing brackets with `} // Ende if` / `} // Ende for`, lesson 20 the class frame with `} // Ende main` / `} // Ende Klasse`. New glossary entry Kommentar and Nachschlagen section „Java › Kommentare“ (de/en/pt).
 - **Web 0.13.36, sequence diagram in lesson 5:** step „Schritt für Schritt“ now shows a sequence as a structure chart: four boxes one below the other (`laenge`, `breite`, `flaeche = laenge * breite`, output 15) with a short caption that each box runs exactly once from top to bottom (de/en/pt).