We're starting to learn Java in a few weeks, and I'd like to get started now. I've already watched a few videos by Junus Ergin. Now our instructor told us that if we wanted to get into it now, we shouldn't just type out code from books or videos, but rather come up with a…
New object a of the class Auto_ created => a.output(); doesn't output anything to the console. Why not? => System.out.println(a) calls toString(). That's it! => Auto_.getsOut(a) works. This is a static method and is passed to an object of the class Auto_ (here Auto_ auto). Why does this work here now, that I can call…
int[ ] i = new int[5]; => I have declared a reference variable i that points to an object (an array). The object (array) contains five int variables. String[ ] s = new String[5]; => … declares a reference variable s that points to an object (array). The object (array) contains 5 string variables. a)…
First of all, I don't think anyone can answer this (and I don't expect anyone to), but maybe there is someone who has been writing Java code every day for 20 years and can see straight away what's wrong. So, yeah, about the info: I'm currently in the process of making a map for my…
=> 1. Why does the compiler complain when System.out.println() is outside the main method. <ID> is expected? => 2. What's the problem here? Why is the method name missing? Which identifier? Designation?
A string is a class in Java. New string objects or reference variables can be easily created by assignment String str3 = "iwas"; String str4 = "iwas" instead of String strx = new String("…"); str3 und str4 sind doch nun zwei verschiedene Referenzvariablen. With str3.equals(str4) you compare the contents of the strings. True, of course!…
In line 15 I put an integer into the …println method The 400 is converted to a string using String.valueOf and then output. This works. In line 16 …println(c.setHubraum(600)) I get an error because of void because the method set.Displacement in the class Car has no return value. public void set.Displacement(int displacement){ this.displacement = displacement;…
Hi, I'd like to program an Android app using Material Design. Both Dart and Kotlin have Material support. The question is, which is better to learn as a beginner, given how different the possibilities are with these languages. I have programming experience in Python.
Which answers are correct and which are incorrect? The x's don't have to be correct.
I coded it: https://github.com/Redd-Devil/Git_Prog1/blob/master/src/Zusatzstellen_Programmieren1/Eratosthenes.java I would be interested in suggestions for improvement
I created a repository on GitHub. I was also able to upload IntelliJ code. What's the best way to add an image of the assignment? I usually have the assignments as PDF files. greeting
=> What do you think, are answers 2 and 4 also correct? Several, one, or no answers can be correct.