38 lines
1.2 KiB
Java
38 lines
1.2 KiB
Java
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package bunny.async;
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import java.util.concurrent.CompletableFuture;
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public class CompletableFutureTest1 {
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public static void main(String[] args) throws Exception {
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CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
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// 模拟一个耗时的计算任务
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try {
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Thread.sleep(1000);
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} catch (InterruptedException e) {
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System.out.println(e.getMessage());
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}
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return 42;
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});
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future.thenAccept(result -> {
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System.out.println("任务结果1: " + result);
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});
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// 等待所有任务完成
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CompletableFuture.allOf(future).join();
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// 返回结果为void
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future.thenAccept(result -> System.out.println("任务结果2: " + result));
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// thenApply 的链式调用
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CompletableFuture<String> thenApply = future.thenApply(result -> {
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System.out.println("任务结果3: " + result);
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return "返回内容";
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}).thenApply(result -> {
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System.out.println("继续调用，看下之前结果：" + result);
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return "最后一次返回";
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});
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System.out.println(thenApply.get());
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}
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}
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