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Java Language


153 Topics

16 requests active popular

Getting started with Java Language Introduction Topic

278
Creating your first Java program
0 improvement requests
0 proposed changes
edited 13 hours ago
+24

Arrays All Versions

810
Creating and Initializing Arrays
123
Creating a List from an Array
16 more examples
0 improvement requests
0 proposed changes
edited Jan 25 at 11:42
+219

Streams Java SE 8–Java SE 9 (Early Access)

210
Using Streams
57
Consuming Streams
25 more examples
0 improvement requests
0 proposed changes
edited 3 hours ago
+95

Lambda Expressions Java SE 8–Java SE 9 (Early Access)

117
Introduction to Java lambdas
64
Using Lambda Expressions to Sort a Collection
10 more examples
0 improvement requests
0 proposed changes
edited Jan 22 at 17:27
+50

Strings All Versions

100
Comparing Strings
23
Changing the case of characters within a String
15 more examples
0 improvement requests
0 proposed changes
edited Dec 23 '16 at 3:35
+128

Enums Java SE 5–Java SE 9 (Early Access)

53
Declaring and using a basic enum
31
Enums with constructors
15 more examples
0 improvement requests
0 proposed changes
edited Dec 29 '16 at 9:22
+53

Generics Java SE 5–Java SE 9 (Early Access)

53
Creating a Generic Class
29
The Diamond
12 more examples
0 improvement requests
0 proposed changes
edited Jan 2 at 20:05
+51

Exceptions and exception handling All Versions

43
Catching an exception with try-catch
18
The try-with-resources statement
10 more examples
0 improvement requests
0 proposed changes
edited Jan 22 at 17:27
+54

Optional Java SE 8–Java SE 9 (Early Access)

33
Map
32
Null-safe chaining
7 more examples
1 improvement request
0 proposed changes
edited Jan 23 at 9:49
+25

Oracle Official Code Standard All Versions

25
Naming Conventions
12
Class Structure
16 more examples
0 improvement requests
0 proposed changes
edited Jan 2 at 20:48
+17

Java Pitfalls All Versions

25
Pitfall: using == to compare primitive wrappers objects such as Integer
13
Pitfall: forgetting to free resources
7 more examples
0 improvement requests
0 proposed changes
edited Jan 7 at 3:12
+17

Collections Java SE 1.2–Java SE 9 (Early Access)

31
Removing items from a List within a loop
10
Declaring an ArrayList and adding objects
14 more examples
0 improvement requests
0 proposed changes
edited Dec 22 '16 at 21:20
+50

Primitive Data Types All Versions

13
The char primitive
8
The float primitive
10 more examples
0 improvement requests
0 proposed changes
edited Jan 4 at 13:19
+43

Documenting Java Code All Versions

18
Class Documentation
13
Method Documentation
6 more examples
0 improvement requests
0 proposed changes
edited Jan 3 at 8:54
+14

Installing Java (Standard Edition) All Versions

39
Setting %PATH% and %JAVA_HOME% after installing on Windows
7
Installing a Java JDK on Linux
10 more examples
0 improvement requests
0 proposed changes
edited Jan 2 at 21:49
+6

Interfaces All Versions

16
Implementing multiple interfaces
9
Declaring and Implementing an Interface
8 more examples
0 improvement requests
0 proposed changes
edited Jan 7 at 22:35
+31

Singletons All Versions

20
Enum Singleton
15
Singleton without use of Enum (eager initialization)
2 more examples
0 improvement requests
0 proposed changes
edited Dec 10 '16 at 16:08
+28

Inheritance All Versions

18
Abstract Classes
10
Using 'final' to restrict inheritance and overriding
9 more examples
0 improvement requests
0 proposed changes
edited Jan 18 at 8:14
+42

Object Class Methods and Constructor All Versions

22
hashCode() method
11
toString() method
6 more examples
0 improvement requests
0 proposed changes
edited Jan 2 at 22:41
+35

Operators All Versions

13
Increment/Decrement Operators (++/--)
10
Conditional Operator (? :)
9 more examples
0 improvement requests
0 proposed changes
edited Jan 26 at 11:02
+49
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Introduction Topic

 Getting started with Java Language