Wikipedia
Java (programming language)
Java (Programmiersprache)
OpenJDK
JDK 17
Tutorials
baeldung
Differences Between Oracle JDK and OpenJDK
Deep Dive Into the New Java JIT Compiler – Graal
YouTube
Java
Java 8 to 18: Most important changes in the Java Platform
Java 19 – The Best Java Release? – Inside Java Newscast #27
Removed
- Access to JDK internals
- JAXB / JAXWS / CORBA
- Nashorn JS Engine
- CMS Garbage Collector
- ParallelScavenge+ Serial Old GC
- Launch-Time JRE version selection
- JVM TI hprof Agent
- jhat tool
- Native-Header Generation tool (javah)
- Pack200
- Solaris and SPARC Ports
- RMI Activation
- Demos and Samples
Deprecated
Deprecated-for-removal
- Applet API
- SecurityManager
- Value Based Classes constructors
- Finalization
No Longer in Oracle JDK
- JavaFX
- Java Web Start
- JRE (and Auto update)
- 32-bit
Failed experiments
- AOT Compiler (9 to 17)
- JIT Compiler (10 to 17)
Improving the Java Programming Language
- Local-Variable Type Inference – var
- Local Variable Syntax for Lambda Parameters
- Switch Expressions
- Text Blocks
- Records / Record Classes/li>
- Pattern Matching for instanceof
- Sealed Classes
- Pattern Matching for switch
Local-Variable Type Inference – var
var url = new URL("http://www.openjdk.com/");
var con = urk.openConnection();
var is = new InputStreamReader(con.getInputStream());
var reader = new BufferedReader(is);
Switch Expressions
return switch(day) {
case MONDAY, FRIDAY, SUNDAY -> 6;
case TUESDAY -> 7;
case THURSDAY, SATURDAY -> 8
case WEDNESDAY -> 9;
};
Text Blocks
var html += """
<tr>
<td>Retweets: %s</td>
<td>Likes: %s</td>
</tr>
""".formatted(t.getRetweetCount(),
t.getLikeCount());
Records / Record Classes
record Point (int x, int y) {}
Pattern Matching for instanceof
if (obj instance of String s) {
// String s = (String) obj not necessary anymore
}
[/code]
<h4>Sealed Classes</h4>
public abstract sealed class Shape permits Circle, Rectangle, Square {...}
public final class Circle extends Shape {...}
public sealed class Rectangle extends Shape permits TransparentRectangle,
FilledRectangle {...}
public final class TransparentRectangle extends Rectangle {...}
public final class FilledRectangle extends Rectangle {...}
public non-sealed class Square extends Shape {...}
Pattern Matching for switch
static String formatterPatternSwitch(Object o) {
return switch(o) {
case Integer i -> String.format("int %d", i);
case Long l -> String.format("long %d", l);
case Double d -> String.format("double %f", d);
case String s -> String.format("String %s", s);
default -> o.toString();
};
}
Pattern Matching for switch – Matching null
static String formatterPatternSwitch(Object o) {
return switch(o) {
case null -> "null";
case Integer i -> String.format("int %d", i);
case Long l -> String.format("long %d", l);
case Double d -> String.format("double %f", d);
case String s -> String.format("String %s", s);
default -> o.toString();
};
}
Keso Rupert
All Java 18 Features In Under 5 Minutes!
- 400: UTF-8 by Default
- 408: Simple Web Server
- 413: Code Snippets in Java API Documentation
- 416: Reimplement Core Reflection with Method Handles
- 417: Vector API (Third Incubator)
- 418: Internet-Address Resolution SPI
- 419: Foreign Function & Memory API (Second Incubator)
- 420: Pattern Matching for switch (Second Preview)
- 421: Deprecate Finalization for Removal
History
| Version |
Date
|
| JDK Beta |
1995
|
| JDK 1.0 |
January 23, 1996 |
| JDK 1.1 |
February 19, 1997
|
| J2SE 1.2 |
December 8, 1998
|
| J2SE 1.3 |
May 8, 2000
|
| J2SE 1.4 |
February 6, 2002
|
| J2SE 5.0 |
September 30, 2004
|
| Java SE 6 |
December 11, 2006
|
| Java SE 7 |
July 28, 2011
|
| Java SE 8 (LTS) |
March 18, 2014
|
| Java SE 9 |
September 21, 2017
|
| Java SE 10 |
March 20, 2018
|
| Java SE 11 (LTS) |
September 25, 2018
|
| Java SE 12 |
March 19, 2019
|
| Java SE 13 |
September 17, 2019
|
| Java SE 14 |
March 17, 2020
|
| Java SE 15 |
September 15, 2020
|
| Java SE 16 |
March 16, 2021
|
| Java SE 17 (LTS) |
September 14, 2021
|
| Java SE 18 |
March 22, 2022
|
