November 2023
Intermediate to advanced
382 pages
6h 28m
German
Content preview from Java lernen – kurz & gutBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
2Schnelleinstieg
2.1Hallo Welt (Hello World)
Wir beginnen den Einstieg in Java mit einem simplen Programm, nämlich wie traditionell in den allermeisten Büchern zum Programmierenlernen mit HelloWorld, der Ausgabe eines Grußes auf der Konsole. Das haben wir schon in etwas komplizierterer Form in der Einleitung gesehen. Wir wollen es weiter vereinfachen und damit unsere Entdeckungsreise starten.
Java bietet mit der JShell einen interaktiven Kommandozeileninterpreter, auch Read-Eval-Print-Loop (REPL) genannt. Das erleichtert das schrittweise Erlernen von Java, weil wir nicht gleich zu Beginn eine Vielzahl an Konzepten verstehen oder zumindest hinnehmen müssen. Als weiterer Vorteil wird uns eine Menge Tipparbeit erspart.
Die interaktive JShell erlaubt ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.