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diff --git a/libjava/classpath/external/jsr166/java/util/concurrent/Delayed.java b/libjava/classpath/external/jsr166/java/util/concurrent/Delayed.java
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+++ b/libjava/classpath/external/jsr166/java/util/concurrent/Delayed.java
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+/*
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/licenses/publicdomain
+ */
+
+package java.util.concurrent;
+
+import java.util.*;
+
+/**
+ * A mix-in style interface for marking objects that should be
+ * acted upon after a given delay.
+ *
+ * <p>An implementation of this interface must define a
+ * <tt>compareTo</tt> method that provides an ordering consistent with
+ * its <tt>getDelay</tt> method.
+ *
+ * @since 1.5
+ * @author Doug Lea
+ */
+public interface Delayed extends Comparable<Delayed> {
+
+    /**
+     * Returns the remaining delay associated with this object, in the
+     * given time unit.
+     *
+     * @param unit the time unit
+     * @return the remaining delay; zero or negative values indicate
+     * that the delay has already elapsed
+     */
+    long getDelay(TimeUnit unit);
+}