Java Collections checkedList() Method21 Mar 2025 | 2 min read The checkedList() is a method of Java Collections class which returns a dynamically typesafe view of the specified list. If an element inserted of the wrong type, it will result in an immediate ClassCastException. SyntaxFollowing is the declaration of checkedList() method: Parameter
ReturnsThe checkedList() method returns a dynamically typesafe view of the specified List. ExceptionsClassCastException Compatibility VersionJava 1.5 and above Example 1Output: Type safe view of the List is: [A, B, C, D] Example 2Output: Checked list content: [one, two, three, four] Exception in thread "main" java.lang.ClassCastException: Attempt to insert class java.lang.Integer element into collection with element type class java.lang.String at java.base/java.util.Collections$CheckedCollection.typeCheck(Collections.java:3038) at java.base/java.util.Collections$CheckedCollection.add(Collections.java:3081) at myPackage.CollectionCheckedListExample2.main(CollectionCheckedListExample2.java:15) Example 3Output: Type safe view of the List is: [10, 20, 30, 40] Example 4Output: [RAJ] [RAJ, 2] Next TopicJava Collections Class |
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