java多线程返回值_Java多线程-有返回值的线程
package cn.thread;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
public class CallableFutureTest {
public static void main(String[] args) throws ExecutionException, InterruptedException {
CallableFutureTest test = new CallableFutureTest();
// 创建一个线程池
ExecutorService pool = Executors.newFixedThreadPool(2);
// 创建两个有返回值的任务
Callable c1 = test.new MyCallable("A");
Callable c2 = test.new MyCallable("B");
// 执行任务并获取Future对象
Future f1 = pool.submit(c1);
Future f2 = pool.submit(c2);
// 从Future对象上获取任务的返回值，并输出到控制台
System.out.println(">>>" + f1.get().toString());
System.out.println(">>>" + f2.get().toString());
// 关闭线程池
pool.shutdown();
}
class MyCallable implements Callable {
private String oid;
MyCallable(String oid) {
this.oid = oid;
}
public Object call() throws Exception {
return oid + "任务返回的内容";
}
}
}
package cn.thread; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; public class CallableFutureTest { public static void main(String[] args) throws ExecutionException, InterruptedException { CallableFutureTest test = new CallableFutureTest(); // 创建一个线程池 ExecutorService pool = Executors.newFixedThreadPool(2); // 创建两个有返回值的任务 Callable c1 = test.new MyCallable("A"); Callable c2 = test.new MyCallable("B"); // 执行任务并获取Future对象 Future f1 = pool.submit(c1); Future f2 = pool.submit(c2); // 从Future对象上获取任务的返回值，并输出到控制台 System.out.println(">>>" + f1.get().toString()); System.out.println(">>>" + f2.get().toString()); // 关闭线程池 pool.shutdown(); } class MyCallable implements Callable { private String oid; MyCallable(String oid) { this.oid = oid; } public Object call() throws Exception { return oid + "任务返回的内容"; } } }