> 原文:[https://www . geesforgeks . org/instance of-operator-vs-is instance-method-in-Java/](https://www.geeksforgeeks.org/instanceof-operator-vs-isinstance-method ...
> 原文:[https://www . geesforgeks . org/number format-getcurrency instance-method-in-Java-with-examples/](https://www.geeksforgeeks.org/numberformat ...
Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields, ...
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