notes/resource/java/指定时间终止程序.md

// onjava/TimedAbort.java  
// (c)2021 MindView LLC: see Copyright.txt  
// We make no guarantees that this code is fit for any purpose.  
// Visit http://OnJava8.com for more book information.  
// Terminate a program after t seconds  
package onjava;  
import java.util.concurrent.*;  
  
public class TimedAbort {  
  private volatile boolean restart = true;  
  public TimedAbort(double t, String msg) {  
    CompletableFuture.runAsync(() -> {  
      try {  
        while(restart) {  
          restart = false;  
          TimeUnit.MILLISECONDS  
            .sleep((int)(1000 * t));  
        }  
      } catch(InterruptedException e) {  
        throw new RuntimeException(e);  
      }  
      System.out.println(msg);  
      System.exit(0);  
    });  
  }  
  public TimedAbort(double t) {  
    this(t, "TimedAbort " + t);  
  }  
  public void restart() { restart = true; }  
}