--- jsr166/src/main/java/util/AbstractQueue.java 2003/05/18 18:10:02 1.1
+++ jsr166/src/main/java/util/AbstractQueue.java 2003/07/28 04:11:54 1.6
@@ -1,3 +1,9 @@
+/*
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain. Use, modify, and
+ * redistribute this code in any way without acknowledgement.
+ */
+
package java.util;
/**
@@ -5,8 +11,11 @@ package java.util;
* element based on offer, poll, and peek, respectively but that throw
* exceptions instead of indicating failure via false or null returns.
* The provided implementations all assume that the base implementation
- * does not allow null elements.
+ * does not allow null elements.
+ * @since 1.5
+ * @author Doug Lea
*/
+
public abstract class AbstractQueue extends AbstractCollection implements Queue {
public boolean add(E x) {
@@ -16,7 +25,7 @@ public abstract class AbstractQueue e
throw new IllegalStateException("Queue full");
}
- public E remove() {
+ public E remove() throws NoSuchElementException {
E x = poll();
if (x != null)
return x;
@@ -24,7 +33,7 @@ public abstract class AbstractQueue e
throw new NoSuchElementException();
}
- public E element() {
+ public E element() throws NoSuchElementException {
E x = peek();
if (x != null)
return x;
@@ -37,4 +46,11 @@ public abstract class AbstractQueue e
;
}
+ // why is this here? Won't Collection declare this itself??? - David
+ public abstract Iterator iterator();
}
+
+
+
+
+