java創(chuàng)建線程的方式有幾種？-創(chuàng)新互聯(lián)
java創(chuàng)建線程的方式有幾種？這篇文章運用了實例代碼展示，代碼非常詳細，可供感興趣的小伙伴們參考借鑒，希望對大家有所幫助。
1、繼承Thread類
public class ThreadCreator extends Thread{
public static void main(String[] args) {
//第一種方式：
ThreadCreator creator = new ThreadCreator();
Thread thread = new Thread(creator,"線程1");
thread.start();
//第二種方式：
Thread thread = new ThreadCreator();
thread.start();
//第三種方式：
new ThreadCreator().start();
}
@Override
public void run() {
System.out.println(Thread.currentThread().getName() + "run");
}
}2、實現(xiàn)Runnable接口
（免費學習視頻教程分享：java視頻教程）
public class ThreadCreator implements Runnable{
public static void main(String[] args) {
ThreadCreator creator = new ThreadCreator();
Thread thread = new Thread(creator,"線程1");
thread.start();
}
@Override
public void run() {
System.out.println(Thread.currentThread().getName() + "run");
}
}3、實現(xiàn)Callable接口
public class ThreadCreator implements Callable{ public static void main(String[] args) throws ExecutionException, InterruptedException { ThreadCreator creator = new ThreadCreator(); FutureTask futureTask = new FutureTask(creator); Thread thread = new Thread(futureTask,"線程"); thread.start(); System.out.println(futureTask.get()); } @Override public Integer call() { return 1024; } }
4、線程池ExecutorService
public class ThreadCreator{
static ExecutorService service = Executors.newFixedThreadPool(5);
public static void main(String[] args) throws ExecutionException, InterruptedException {
//execute無返回值
service.execute(new ThreadTask(1,"1"));
//submit有返回值
Future result = service.submit(new ThreadTaskCall());
System.out.println(result.get());
service.shutdownNow();
}
static class ThreadTask implements Runnable{
private int param1;
private String param2;
public ThreadTask(int param3,String param4){
this.param1 = param3;
this.param2 = param4;
}
@Override
public void run() {
System.out.println(param1+param2);
}
}
static class ThreadTaskCall implements Callable{
@Override
public Integer call() throws Exception {
return 1024;
}
}
} 線程池中submit和execute的區(qū)別：
（1）可接受的任務類型不一樣：execute只能接受Runnable任務，submit還可以接受Callable任務。
（2）返回值：execute無返回值，任務一旦提交，無法在當前線程中監(jiān)控執(zhí)行結果。submit有一個Future類型的返回值，用來接收返回值或響應異常。通過get()方法獲取。
submit底層還是調用的execute，只是在此基礎上用future封裝了一層，并將執(zhí)行過程中產生的異常全部封裝在一個變量中：
public void run() {
if (state != NEW ||
!UNSAFE.compareAndSwapObject(this, runnerOffset,
null, Thread.currentThread()))
return;
try {
Callable c = callable;
if (c != null && state == NEW) {
V result;
boolean ran;
try {
result = c.call();
ran = true;
} catch (Throwable ex) {
result = null;
ran = false;
setException(ex);
}
if (ran)
set(result);
}
} finally {
runner = null;
int s = state;
if (s >= INTERRUPTING)
handlePossibleCancellationInterrupt(s);
}
}
protected void setException(Throwable t) {
if (UNSAFE.compareAndSwapInt(this, stateOffset, NEW, COMPLETING)) {
outcome = t;
UNSAFE.putOrderedInt(this, stateOffset, EXCEPTIONAL); // final state
finishCompletion();
}
} 另外，spring中的schedule注解借鑒使用了submit的處理方式。
5、匿名內部類
public class ThreadCreator {
public static void main(String[] args) {
//繼承Thread類
new Thread() {
@Override
public void run() {
System.out.println("extends Thread Class!");
}
}.start();
//實現(xiàn)Runnable接口
new Thread(new Runnable() {
@Override
public void run() {
System.out.println("implement Runnable!");
}
}).start();
//實現(xiàn)Callable接口
new Thread(new FutureTask(new Callable() {
@Override
public Integer call() throws Exception {
return 1024;
}
})).start();
//lambda表達式
new Thread(() -> System.out.println("execute single code")).start();
new Thread(() -> {
System.out.println("execute multiple code");
}).start();
}
} lambda線程池：
public class ThreadCreator {
static ExecutorService service = Executors.newFixedThreadPool(5);
static List list = new ArrayList();
public static void main(String[] args) {
service.execute(() -> execute()); //無返回值
Future future = service.submit(() -> execute()); //有返回值
list.add(future);
}
public static void execute() {
//do something
}
}以上就是java創(chuàng)建線程的方式匯總，內容較為全面，小編相信有部分知識點可能是我們日常工作可能會見到或用到的。希望你能通過這篇文章學到更多知識。
另外有需要云服務器可以了解下創(chuàng)新互聯(lián)scvps.cn，海內外云服務器15元起步，三天無理由+7*72小時售后在線，公司持有idc許可證，提供“云服務器、裸金屬服務器、高防服務器、香港服務器、美國服務器、虛擬主機、免備案服務器”等云主機租用服務以及企業(yè)上云的綜合解決方案，具有“安全穩(wěn)定、簡單易用、服務可用性高、性價比高”等特點與優(yōu)勢，專為企業(yè)上云打造定制，能夠滿足用戶豐富、多元化的應用場景需求。
文章標題：java創(chuàng)建線程的方式有幾種？-創(chuàng)新互聯(lián)
本文路徑：http://m.jiaotiyi.com/article/dhcsgh.html