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resource/java/指定时间终止程序.md

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+```java
+// 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; }  
+}
+```