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1. What are the features of object orientation?
2. Is string the most basic data type? Basic data types include byte, Int, Char, long, float, double, Boolean, and short.
3. What is the difference between int and integer?
4. Differences between string and stringbuffer
5. What are the similarities and differences between runtime exceptions and general exceptions?
6. Tell the servlet lifecycle and the difference between Servlet and CGI.
7. Specify the storage performance and features of arraylist, vector, and sorted list.
8. What technologies are EJB implemented based on? And the difference between sessionbean and entitybean, and the difference between statefulbean and statelessbean.
9. Differences between collection and collections.
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If you really want to learn java well, I think there are more questions that need to be learned. I have sorted out the 120 questions about Java, Which is easy and difficult. Let's take a look at your understanding of Java.
Http://www.abcjava.com/html/JAVA/JAVAjichu/2009/1012/1031.html
Http://www.abcjava.com/html/JAVA/JAVAjichu/2009/1012/1033.html
Http://www.abcjava.com/html/JAVA/JAVAjichu/2009/1012/1034.html
Http://www.abcjava.com/html/JAVA/JAVAjichu/2009/1012/1035.html
Wish you a pleasant learning and life !!!
