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Java Language


151 Topics

25 requests active popular

Arrays All Versions

759
Creating and Initializing Arrays
119
Creating a List from an Array
16 more examples
0 improvement requests
0 proposed changes
edited 2 days ago
+207

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

180
Using Streams
53
Consuming Streams
25 more examples
0 improvement requests
0 proposed changes
edited Oct 3 at 17:53
+88

Java Overview All Versions

181
Creating a new Java program
0 improvement requests
0 proposed changes
edited Oct 4 at 16:26
+21

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

83
Introduction to Java lambdas
53
Using Lambda Expressions to Sort a Collection
11 more examples
0 improvement requests
0 proposed changes
edited 2 hours ago
+48

Strings All Versions

89
Comparing Strings
22
Changing the case of characters within a String
15 more examples
0 improvement requests
0 proposed changes
edited 22 hours ago
+116

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

43
Declaring and using a basic enum
27
Enums with constructors
15 more examples
0 improvement requests
0 proposed changes
edited Sep 26 at 1:39
+49

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

48
Creating a Generic Class
26
Diamond operator
13 more examples
0 improvement requests
0 proposed changes
edited Sep 23 at 11:59
+44

Exceptions All Versions

41
Catching an exception with try-catch-finally
16
Custom Exceptions
10 more examples
0 improvement requests
0 proposed changes
edited Oct 5 at 23:43
+49

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

29
Map
27
Null-safe chaining
7 more examples
0 improvement requests
0 proposed changes
edited Sep 19 at 9:39
+21

Oracle Official Code Standard All Versions

15
Naming Conventions
10
Class Structure
16 more examples
0 improvement requests
0 proposed changes
edited Sep 19 at 15:05
+15

Primitive Data Types All Versions

12
The char primitive
7
The float primitive
12 more examples
0 improvement requests
0 proposed changes
edited Sep 22 at 18:06
+36

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

26
Removing items from a List within a loop
8
Constructing collections from existing data
17 more examples
0 improvement requests
0 proposed changes
edited Oct 2 at 14:17
+46

Operators All Versions

11
Increment/Decrement Operators (++/--)
10
Ternary Operator (? :)
15 more examples
0 improvement requests
0 proposed changes
edited 21 hours ago
+45

Documenting Java Code All Versions

15
Class Documentation
10
Method Documentation
6 more examples
0 improvement requests
0 proposed changes
edited Sep 21 at 16:33
+12

Interfaces All Versions

12
Implementing multiple interfaces
7
Declaring and Implementing an interface
8 more examples
1 improvement request
0 proposed changes
edited 21 hours ago
+21

Installing Java (Standard Edition) All Versions

32
Setting %PATH% and %JAVA_HOME% after installing on Windows
3
Installing a Java JDK on Linux
9 more examples
0 improvement requests
0 proposed changes
edited Oct 6 at 14:23
+1

Inheritance All Versions

18
Abstract Classes
9
Using 'final' to restrict inheritance and overriding
9 more examples
1 improvement request
0 proposed changes
edited Sep 26 at 15:18
+39

Singletons All Versions

16
Enum Singleton
10
Singleton without use of Enum (eager initialization)
3 more examples
0 improvement requests
0 proposed changes
edited Sep 27 at 11:09
+22

Object class methods & constructor All Versions

17
hashCode() method
9
toString() method
6 more examples
0 improvement requests
0 proposed changes
edited Sep 21 at 22:56
+29

Java Pitfalls All Versions

12
Pitfall: using == to compare primitive wrappers objects such as Integer
8
Pitfall: using == to compare strings
6 more examples
0 improvement requests
0 proposed changes
edited 20 hours ago
+8
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Overview Topic

Java Overview