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mLine 3:
Line 3: − sudo apt-get update+ − sudo apt-get install oracle-java8-installer</nowiki>+ Line 527:
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→Serialization
===With apt===
===With apt===
<nowiki>sudo apt-add-repository ppa:webupd8team/java
<nowiki>sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer</nowiki>
Also ensure your JAVA_HOME variable has been set to:
Also ensure your JAVA_HOME variable has been set to:
</syntaxhighlight>
</syntaxhighlight>
== Streams ==
==Streams==
<syntaxhighlight lang="java">
<syntaxhighlight lang="java">
List<Integers> numbers = List.of(3, 5, 8, 213, 45, 4, 7)
List<Integers> numbers = List.of(3, 5, 8, 213, 45, 4, 7)
</syntaxhighlight>
</syntaxhighlight>
== Classes and Objects ==
==Classes and Objects==
<source lang="java">
<source lang="java">
class Person {
class Person {
private transient int variableName;</source>
private transient int variableName;</source>
Static fields aren't serialized too.
Static fields aren't serialized too.
== Threading ==
<syntaxhighlight lang="java">
class Task1 extends Thread {
public void run() {
System.out.print("\nTask1 Started");
// Do something
Thread.yield(); // let other thread take over
System.out.print("\nTask1 Done");
}
}
class Task2 implements Runnable {
public void run() {
System.out.print("\nTask2 Started");
// Do something
System.out.print("\nTask2 Done");
}
}
public class ThreadBasicsRunner {
public static void main(String[] args) throws InterruptedException {
Task1 task1 = new Task1();
task1.setPriority(10); // min = 1 max = 10
task1.start();
Task2 task2 = new Task2();
Thread task2thread = new Thread(task2);
task2thread.start();
// wait for task1 to end
task1.join();
// task3
System.out.print("\nTask3 Started");
// Do something
System.out.print("\nTask3 Done");
}
}
</syntaxhighlight>
=== Executor service ===
<syntaxhighlight lang="java">
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
class Task extends Thread{
public Task(int number){
this.number = number;
}
public void run() {
System.out.print("\nTask" + number + " Started");
for (i=number*100; i<=number*100+99; i++){
System.out.print(i + " ");
}
System.out.print("\nTask" + number + " Done");
}
}
public class ExecutorServiceRunner {
public static void main(String[] args){
// ExecutorService executorService = Executors.newSingleThreadExecutor();
ExecutorService executorService = Executors.newFixedThreadPool(2);
executorService.execute(new Task(1));
executorService.execute(new Task(2));
executorService.execute(new Task(3));
executorService.execute(new Task(4));
executorService.shutdown()
}
}
</syntaxhighlight>
==Eclipse shortcuts==
==Eclipse shortcuts==