Java 15 面试题与答案
Question: What are Specialized Implementations of TreeMap Methods in Java 15?Answer:In TreeMap, specialized methods putIfAbsent(), computeIfAbsent(), computeIfPresent(), compute(), and merge() were implemented. These methods were only specified as default methods in the Map interface since Java 8. The TreeMap-specific implementations are optimized for the underlying red-black tree; accordingly, they are more performant than the interface's default methods. |
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