archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 14:54:52 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8247605: Avoid array allocation when concatenating with empty string

Browse source 
Reviewed-by: redestad, plevart
This commit is contained in:
Tagir F. Valeev 2020-08-10 16:14:03 +00:00
parent 8e687450d6
commit 55e381b32f
5 changed files with 304 additions and 238 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/java.base/share/classes/java/util/TreeMap.java
View file

@ -1790,6 +1790,42 @@ public class TreeMap<K,V>
return m.put(key, value);
}
public V putIfAbsent(K key, V value) {
if (!inRange(key))
throw new IllegalArgumentException("key out of range");
return m.putIfAbsent(key, value);
}
public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
if (!inRange(key))
throw new IllegalArgumentException("key out of range");
return m.merge(key, value, remappingFunction);
}
public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
if (!inRange(key)) {
// Do not throw if mapping function returns null
// to preserve compatibility with default computeIfAbsent implementation
if (mappingFunction.apply(key) == null) return null;
throw new IllegalArgumentException("key out of range");
}
return m.computeIfAbsent(key, mappingFunction);
}
public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
if (!inRange(key)) {
// Do not throw if remapping function returns null
// to preserve compatibility with default computeIfAbsent implementation
if (remappingFunction.apply(key, null) == null) return null;
throw new IllegalArgumentException("key out of range");
}
return m.compute(key, remappingFunction);
}
public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
return !inRange(key) ? null : m.computeIfPresent(key, remappingFunction);
}
public final V get(Object key) {
return !inRange(key) ? null : m.get(key);
}