collections in java interview questions and answers

Java Basics 1. What are the features of object orientation? 1. Abstraction: Abstraction is to ignore those aspects irrelevant to the current target in a topic, so that you can pay more attention to the aspects related to the current target. Abstraction is not intended to understand all the problems, but to select a part of the problem. Abstract: Process abstraction and data abstraction. 2. Inheritance: Inheritance is a hierarchical model that connects

The first one discusses object-oriented programming and its features, common questions about Java and its functionality, Java collection classes, garbage collectors, this chapter focuses on exception handling, Java applets, SWING,JDBC, remote method Invocation (RMI), servlet, and JSP. Exception handling

I. Explanations of the following J2EE terms(1) JNDI: Java Naming Directory Interface, Java Naming directory service. the main function is to provide a directory system that allows applications from other places to leave their own indexes on it to quickly find and locate distributed applications.(2) JMS: Java Message Service,

Jame Dean 2016-12-06 17:12 Basic Knowledge section (90 points) one, the single choice question (altogether 12 questions, each question 3 points, altogether 36 points. ) 1, Java is from (B) language improvement redesign. A) Ada B) C + + C) pasacal D) BASIC 2. Which of the following statements is correct (B) A Java program generates machine code after compiling B

1 . What are worker threads and SwingWorker and how do I use them? When a swing program needs to perform a long task, it is usually done using a worker thread. Each task executes in a worker thread, which is an instance of the Javax.swing.SwingWorker class. The SwingWorker class is an abstract class; You must define its subclasses to create a SwingWorker object, which is usually done using anonymous inner classes. SwingWorker provides some features of communication and control: [1]swingworker su