What are the most important topics I have to learn in Core Java in order to become a powerful programmer?

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Amit raj

Technical Lead & Archiect - Azure & Databricks, Spark,Kafka,Snowflake,Scala,Pyspark,AWS Cloud,NoSQL

JVM,Class ,Object ,Inheritance,Interface,Static,Final,Thread,Collection
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To become a powerful programmer in core java you need to learn following thing in depth. Collections and Generics Oops Concepts Access Specifiers Multi threading Abstract Classes and Interfaces Constructors.
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