For me, I think beginners should concentrate more on Core Java first and for in-depth knowledge of Core Java and its core features, you may study and practice reading Decodejava.com presenting simple and easy Java tutorial.
For beginners they have covered most of the Java features –
- Control Statements -Control statements like if, if-else, switch, while loop, break, continue etc control the flow of our program. To know more about control statements, starting with if statement, please read Java if statement
- Java Exceptions– Exception is an unusual exceptional condition or a runtime error, which occurs only during the runtime of a Java program. To know about Java Exceptions and how they are caused in a Java program, you may read Exception Handling in Java
- String – String is a nothing but a sequence of characters within double quotes. To know about String and its various important methods, please follow Java String Class – Decodejava.com
- File Input/Output – File Input/Output classes are used to read/write data from the files. To know more about file input/output and its important classes with short code examples , please follow – Java File Class – Decodejava.com
- Thread – A thread is a program in execution that is performing some specific task. Thread is the most important feature of Core Java and to know more Thread and its features with easy code examples, please read Threads in Java – Decodejava.com
- Applet – An applet is a Java program that can be transported over the internet and executed by a Java enabled web-browser. To know more about Applet and it’s important features, you may read Java Applet Class- Decodejava.com
- Collection Framework – Collection Framework provides important interfaces and classes using which we can manage a group of objects. Collections comes in the advance topics of Core Java but you shouldn’t miss it. To know more about every Collection classes with short code examples, you may read ArrayList in Java- Decodejava.com
- Swing package- Swing framework gives us an ability to create window based applications and its easy to use graphical user interface(GUI). For more on Swing and its classes with easy code examples, you may follow Java Swing- Decodejava.com
Hope this helps and don’t forget there are no shortcuts to success, so practice your Java programming as much as possible to excel.
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