Java
/
Threads
- 1 Basics 9
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Classes S
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Objects S
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Arrays S
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Variables S
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Loops S
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Numbers S
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Strings S
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Exceptions S
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Regexp S
- 2 OOP 9
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Inheritance
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Polymorphism
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Static S
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Abstract
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Interfaces
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Constructors S
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Packages
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Nested Classes
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Final
- 3 Compiler 2
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Sublime Text S
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Apache Ant
- 4 Collections 8
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Lists
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Comparable S
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Sets
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Maps
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Generics
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Properties
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Streams
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Json
- 5 Threads 4
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Create Thread S
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Sleep
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Lock
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Scheduler
- 6 Design Patterns 4
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Singleton
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Observer
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Strategy
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Mediator
- 7 Swing 12
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Frame
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Panel
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Listener
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Combo Box
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Label
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Image
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Menu
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Table
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Layout
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Drawing
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Timer
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Designer
- 8 I/O 7
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Streams IO
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Socket
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Watching Files
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Mail
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Logger
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Clipboard
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Encrypt S
- 9 Effective 7
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Constructors S
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Dependency Injection
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Composition
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Interfaces Default
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Import Static S
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Enums
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Lambdas
- 10 Junit 5
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About Junit S
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Test Case
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Suite Test
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Annotations
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Exceptions
- 11 Lambdas 7
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Expressions S
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Functional Interfaces
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Streams
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Common Operations
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Default Methods
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Static Methods S
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Single Responsibility
- 12 JavaFX 6
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Openjfx
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Scene Builder
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First App
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Jar Archive
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On Action
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Change Listener
- 13 Maven 4
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Demo
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Spring Boot
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Junit
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Guava
- 14 Spring Boot 13
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Quick start S
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Rest service S
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Consuming rest S
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Templates S
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Security auth S
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Command line S
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Scheduled task S
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Ajax S
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Jdbc mysql S
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Encrypt password S
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Https S
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Jwt S
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Post request S
R
Q
SLEEP
p26 One of the best ways to help your threads take turns is by using sleep.
/**
* One of the best ways to help your threads take turns is ...
* by using sleep.
*
* The main thread will became the current running tread.
*/
package com.minte9.threads.sleep;
public class Sleep {
public static void main(String[] args)
throws InterruptedException {
System.out.println("Start in main");
new Thread(new MyClass(1)).start();
new Thread(new MyClass(2)).start();
new Thread(new MyClass(3)).start();
System.out.println("Back in main");
/*
Start in main
Back in main
Thread 1 / run
Thread 3 / run
Thread 2 / run
*/
}
}
class MyClass implements Runnable {
int no = 0;
public MyClass(int i) {
no = i;
}
@Override public void run() {
try {
Thread.sleep(1000); // Look Here
} catch(InterruptedException e) {}
System.out.println("Thread " + no + " / run");
}
}
STOP
p27 Use a flag to stop a thread run() execution.
/**
* A thread is automatically destroyed when the run() method has completed.
*
* You might need to stop a thread on runtime.
* Use a flag to control thread run() execution.
*/
package com.minte9.threads.sleep;
public class Stop {
public static void main(String[] args)
throws InterruptedException {
System.out.println("Start main thread");
ThreadClass t1 = new ThreadClass("A");
ThreadClass t2 = new ThreadClass("B");
new Thread(t1).start();
new Thread(t2).start();
Thread.sleep(2000);
t1.stop();
t2.stop();
Thread.sleep(1000);
System.out.println("Exit main thread");
/*
Start main thread
Thread A / Run
Thread B / Run
Thread A / Run
Thread B / Run
Thread A / Exit
Thread B / Exit
Exit main thread
*/
}
}
class ThreadClass implements Runnable {
private String name;
private Boolean exit = false;
public ThreadClass(String n) {
name = n;
}
@Override public void run() {
while(!exit) {
System.out.println("Thread " + name + " / Run");
sleep(1000);
}
System.out.println("Thread " + name + " / Exit");
}
public void sleep(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {}
}
public void stop() {
exit = true;
}
}
➥ Questions
Last update: 231 days ago