1773 // public methods
1774
1775 public boolean isEmpty() {
1776 return (fromStart && toEnd) ? m.isEmpty() : entrySet().isEmpty();
1777 }
1778
1779 public int size() {
1780 return (fromStart && toEnd) ? m.size() : entrySet().size();
1781 }
1782
1783 public final boolean containsKey(Object key) {
1784 return inRange(key) && m.containsKey(key);
1785 }
1786
1787 public final V put(K key, V value) {
1788 if (!inRange(key))
1789 throw new IllegalArgumentException("key out of range");
1790 return m.put(key, value);
1791 }
1792
1793 public final V get(Object key) {
1794 return !inRange(key) ? null : m.get(key);
1795 }
1796
1797 public final V remove(Object key) {
1798 return !inRange(key) ? null : m.remove(key);
1799 }
1800
1801 public final Map.Entry<K,V> ceilingEntry(K key) {
1802 return exportEntry(subCeiling(key));
1803 }
1804
1805 public final K ceilingKey(K key) {
1806 return keyOrNull(subCeiling(key));
1807 }
1808
1809 public final Map.Entry<K,V> higherEntry(K key) {
1810 return exportEntry(subHigher(key));
1811 }
1812
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1773 // public methods
1774
1775 public boolean isEmpty() {
1776 return (fromStart && toEnd) ? m.isEmpty() : entrySet().isEmpty();
1777 }
1778
1779 public int size() {
1780 return (fromStart && toEnd) ? m.size() : entrySet().size();
1781 }
1782
1783 public final boolean containsKey(Object key) {
1784 return inRange(key) && m.containsKey(key);
1785 }
1786
1787 public final V put(K key, V value) {
1788 if (!inRange(key))
1789 throw new IllegalArgumentException("key out of range");
1790 return m.put(key, value);
1791 }
1792
1793 public V putIfAbsent(K key, V value) {
1794 if (!inRange(key))
1795 throw new IllegalArgumentException("key out of range");
1796 return m.putIfAbsent(key, value);
1797 }
1798
1799 public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
1800 if (!inRange(key))
1801 throw new IllegalArgumentException("key out of range");
1802 return m.merge(key, value, remappingFunction);
1803 }
1804
1805 public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
1806 if (!inRange(key)) {
1807 if (mappingFunction.apply(key) == null) return null;
1808 throw new IllegalArgumentException("key out of range");
1809 }
1810 return m.computeIfAbsent(key, mappingFunction);
1811 }
1812
1813 public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
1814 if (!inRange(key)) {
1815 if (remappingFunction.apply(key, null) == null) return null;
1816 throw new IllegalArgumentException("key out of range");
1817 }
1818 return m.compute(key, remappingFunction);
1819 }
1820
1821 public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
1822 return !inRange(key) ? null : m.computeIfPresent(key, remappingFunction);
1823 }
1824
1825 public final V get(Object key) {
1826 return !inRange(key) ? null : m.get(key);
1827 }
1828
1829 public final V remove(Object key) {
1830 return !inRange(key) ? null : m.remove(key);
1831 }
1832
1833 public final Map.Entry<K,V> ceilingEntry(K key) {
1834 return exportEntry(subCeiling(key));
1835 }
1836
1837 public final K ceilingKey(K key) {
1838 return keyOrNull(subCeiling(key));
1839 }
1840
1841 public final Map.Entry<K,V> higherEntry(K key) {
1842 return exportEntry(subHigher(key));
1843 }
1844
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