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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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package jsr166x; |
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Collection c = (Collection) o; |
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try { |
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return containsAll(c) && c.containsAll(this); |
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} catch (ClassCastException unused) { |
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} catch (ClassCastException unused) { |
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return false; |
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} catch (NullPointerException unused) { |
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return false; |
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} |
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public E pollFirst() { |
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Map.Entry<E,?> e = s.pollFirstEntry(); |
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return (e == null)? null : e.getKey(); |
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return (e == null) ? null : e.getKey(); |
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} |
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public E pollLast() { |
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Map.Entry<E,?> e = s.pollLastEntry(); |
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return (e == null)? null : e.getKey(); |
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return (e == null) ? null : e.getKey(); |
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} |
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} |