66
JAWhat is changed in HashMap after Java 8?
HashMap buckets are converted into Tree from Long Linked List
Improvement in time complexity,faster access and search operations
#java #Hashmap #java8 #improvement #treemap
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JAComment your answer 👇
Answer:B
Explanation:Map<Integer, String> map = new HashMap<>();
→ Creates an empty HashMap
map.put(1, "A");
→ Map becomes {1=A}
map.put(1, "B");
→ Same key 1 again
→ HashMap does not allow duplicate keys
→ It replaces the old value
Now map becomes {1=B}
System.out.print(map);
→ Prints {1=B}
✅ Final Output: {1=B}
Simple rule:
HashMap allows duplicate values, but not duplicate keys 🔥
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@javainterview.track
188
JACurious about how to find characters or words in a Java string? 💻🔍 In my latest Java Strings 101 video, I break down the indexOf() method with easy, beginner-friendly examples! See how simple it is to search your strings and level up your coding skills.
Got a question or topic request? Drop it in the comments!👇
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COWhat is the output?
.
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@geekific
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JAWhat is JVM in Java? ☕
JVM executes Java bytecode
and allows Java programs to run anywhere.
The JVM performs the following main tasks:
o Loads code
o Verifies code
o Executes code
o Provides runtime environment
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