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8158253: Collections: Implement a noop clear() for EmptyList, EmptyMap and EmptySet

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Reviewed-by: psandoz
This commit is contained in:
Mohamed Naufal 2016-05-28 13:57:30 +05:30 committed by Paul Sandoz
parent 40abbd6d10
commit 6e64c35e6f
1 changed files with 3 additions and 0 deletions
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jdk/src/java.base/share/classes/java/util/Collections.java
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@ -4324,6 +4324,7 @@ public class Collections {
public int size() {return 0;}
public boolean isEmpty() {return true;}
public void clear() {}
public boolean contains(Object obj) {return false;}
public boolean containsAll(Collection<?> c) { return c.isEmpty(); }
@ -4447,6 +4448,7 @@ public class Collections {
public int size() {return 0;}
public boolean isEmpty() {return true;}
public void clear() {}
public boolean contains(Object obj) {return false;}
public boolean containsAll(Collection<?> c) { return c.isEmpty(); }
@ -4582,6 +4584,7 @@ public class Collections {
public int size() {return 0;}
public boolean isEmpty() {return true;}
public void clear() {}
public boolean containsKey(Object key) {return false;}
public boolean containsValue(Object value) {return false;}
public V get(Object key) {return null;}