Page 66 | Java Blog - Java News and Learning posts on CodeGym

Oleksandr Miadelets Java Collections
20 July 2018 8:53
ArrayList in pictures Hi! Today's lesson about ArrayList will be both easier and harder than previous lessons. It will be more difficult because today we're going to look under the hood of ArrayList and study what happens during various operations. On the other hand, this lesson will have almost no code ...
20.07.2018
20037views
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Volodymyr Portianko Java Collections
20 July 2018 7:30
Deleting an element from an ArrayList Hi! In the last lesson, we got acquainted with the ArrayList class, and learned how to perform the most common operations with this class. In addition, we pointed out several differences between an ArrayList and an ordinary array. But we skirted one topic, namely, how to delete elements from an ArrayList ...
20.07.2018
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CodeGym Java Developer
20 July 2018 7:20
Old Level 04 Old Level 04
20.07.2018
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CodeGym Java Developer
20 July 2018 7:20
Old Level 03 Old Level 03
20.07.2018
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Volodymyr Portianko Java Arrays
19 July 2018 13:26
Something about arrays Hi! Previously in your training, we've worked with single objects (and primitive types). But what if we need to work with a whole group of objects instead of just one? For example, say we want to create a list of birthdays of all employees at our company. We'll benefit from a special data structure called an array ...
19.07.2018
20563views
29comments
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Milan Vucic Core Java
19 July 2018 12:22
More about the garbage collector Hi! In the last lesson, we first became acquainted with Java's built-in garbage collector and got a rough idea of how it works. It works in the background while your program is running, collecting unnecessary objects that will be deleted later. Thus, it frees up memory that can be used to create new objects in the future ...
19.07.2018
29917views
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John Selawsky Java Objects
19 July 2018 12:04
Object lifecycle Hi! I think you wouldn't be very surprised if I told you that your computer has a limited amount of memory :) Even your hard drive (which is many, many times the size of RAM) can get chock full of your favorite games, TV shows, and other things. To prevent this from happening, you need to monitor the current state ...
19.07.2018
31695views
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Vasyl Malik Statements in Java
19 July 2018 11:25
Java Ternary operator Hi! Today's lesson won't be very long, but it will definitely be useful :) We're going to talk about the so-called ternary operator. Ternary means "composed of three parts". It is an alternative to the if-else control flow statement that you've already met. Let's give an example. Suppose someone decided...
19.07.2018
21786views
25comments
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Volodymyr Portianko Inheritance in Java
19 July 2018 9:01
Base class constructors Hi! Last time we talked about constructors and learned a lot about them. Now we're going to talk about base class constructors. What's a base class?It has to do with the fact that in Java several different classes can have a common origin. This is called inheritance. Several child classes can have one common ...
19.07.2018
36679views
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CodeGym Java Developer
19 July 2018 7:19
Old Level 02 Old Level 02
19.07.2018
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Jesse Haniel Java Numbers
18 July 2018 10:14
Numeric operators in Java Hi! Today we'll consider a very important topic, namely, numeric operators in Java. In programming, numbers are everywhere. If you dig deep and remember high school, you may recall that a computer represents all information in a numerical format: combinations of zeros and ones, also known as binary code ...
18.07.2018
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CodeGym Java Developer
18 July 2018 7:17
Old Level 01 Old Level 01
18.07.2018
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