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今天就跟大家聊聊有關java中怎樣創建線程,可能很多人都不太了解,為了讓大家更加了解,小編給大家總結了以下內容,希望大家根據這篇文章可以有所收獲。
1. 繼承Thread類 2. 實現Runnable接口 3. 實現Callable接口,使用FutureTask方式 4. 使用線程池
package com.pimee.thread; /** * 繼承Thread創建線程 * @author Bruce Shaw * */ public class ThreadTest extends Thread { public static void main(String[] args) { ThreadTest test = new ThreadTest(); test.start(); } @Override public void run() { System.out.println("This is TestThread..."); } }
package com.pimee.thread; /** * 實現runnable接口創建線程 * @author Bruce Shaw * */ public class RunnableTest implements Runnable { private static int test = 10; @Override public void run() { System.out.println("This is RunnableTest..."); } public static void main(String[] args) { RunnableTest test = new RunnableTest(); new Thread(test).start(); } }
以上兩種方式實現都比較簡單,缺點很明顯,就是線程執行后沒有返回值。且看下面帶有返回值的實現方式:
package com.pimee.thread; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.FutureTask; import java.util.concurrent.TimeoutException; /** * 實現callable接口,基于FutureTask方式實現 * @author Bruce Shaw * */ public class CallableTest implements Callable<String> { public static void main(String[] args) throws InterruptedException, ExecutionException, TimeoutException { CallableTest mc = new CallableTest(); FutureTask<String> ft = new FutureTask<>(mc); Thread thread = new Thread(ft); thread.start(); System.out.println(ft.get()); } @Override public String call() throws Exception { System.out.println("Callable is running..."); return "Callable finished and return value..."; } }
package com.pimee.thread; import java.util.concurrent.*; /** * 基於線程池創建 * * @author Bruce Shaw * */ public class ThreadPoolTest implements Callable<String> { public static void main(String[] args) throws InterruptedException, ExecutionException, TimeoutException { ExecutorService newCachedThreadPool = Executors.newSingleThreadExecutor(); Future<String> future = newCachedThreadPool.submit(new CallableTest()); try { System.out.println(future.get()); } catch (Exception e) { e.printStackTrace(); } finally { newCachedThreadPool.shutdown(); } } @Override public String call() throws Exception { System.out.println("Callable is running..."); return "Callable finished and return value..."; } }
看完上述內容,你們對java中怎樣創建線程有進一步的了解嗎?如果還想了解更多知識或者相關內容,請關注億速云行業資訊頻道,感謝大家的支持。
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