note

Java : 配列から重複を削除する2(HashSet)

Javaで配列から重複をなくすには、HashSetを使う方法が一般的です。HashSetは重複した要素を自動的に削除するため、これを使って簡単に重複を除去することができます。 以下に、配列から重複を取り除くJavaコードの例を示します。 例: 配列から重複をなくす ...
GitHub

java.lang.ClassCastException: class java.util.HashSet cannot be cast to class java.util ...

Plugin version 1.4.1 on CLion 2022.2. Thanks for the plugin! Yet, I get the following exception after just opening a project that contains dot files and then navigating to some non-dot file via ...
GitHub

ClassCastException due to HashSet being used in a non thread-safe way

OpenJDK Runtime Environment Temurin-21.0.7+6 (build 21.0.7+6-LTS) OpenJDK 64-Bit Server VM Temurin-21.0.7+6 (build 21.0.7+6-LTS, mixed mode, sharing) Error scanning ...
findnerd.com

HashSet Class

It extends AbstractList class and implements List interface. It uses hashing technique to store data. It contains only unique elements. We can use HashSet class by ...
InfoWorld

The Contains Trap in Java Collections

One of the nasty little traps a Java developer can run into occurs when Collection.contains(Object) is not used with appropriate understanding. I demonstrate this ...