Simple Java is a collection of frequently asked Java questions.中文翻译
##1. Strings and Arrays 字符串和数组
Create Java string Using ” ” or constructor?
Is string passed by reference?
How to check if an array contains a value efficiently?
##2. Common Methods
Comparator vs. Comparable
The contract between hashCode() and equals()
Java passes object by reference or by value?
Iteration vs. recursion
##3. Classes and Interfaces
What is instance initializer?
Fields can not be overridden?
Inheritance vs. composition
How to use Java Enum?
How many types of inner classes?
What is inner interface?
Constructors of sub and super classes?
4 access levels
When to use private constructors?
Class hierarchy of Collection and Map
ArrayList vs. LinkedList vs. Vector
HashSet vs. TreeSet vs. LinkedHashSet
HashMap vs. TreeMap vs. HashTable vs. LinkedHashMap
Sort Map By Value
Efficient counter
Frequently used methods of HashMap HashMap常用方法。例如，按值排序
Deep understanding of Arrays.sort(T[], Comparator < ? super T > c)
How do developers sort? 常见排序，Collections、Arrays、TreeMap、TreeSet
java.util.ConcurrentModificationException
Why do we need generic types?
Why do we need generic methods?
What is type erasure?
Set vs. Set<?>
What's the best way of converting Array to ArrayList?
How exception handling works?
Class hierarchy of exceptions
Monitors – the key idea of Java synchronization
How to make a method thread-safe?
join()
notify() and wait()
Create thread by overriding
Read file line by line
Write file line by line
FileOutputStream vs. FileWriter
Should .close() be put in finally block or not?
Java serialization
How to use properties file?
##8. Compiler and JVM
JVM run-time data areas
How does Java handle aliasing？
What does an array look like in memory?
What is memory leak?
What can be learned from "Hello World"?
Whan and how a class is loaded and initialized?
Static type checking
Generate code for overloaded and overridden methods?
Top 10 mistakes Java developers make
Top 10 methods for Java arrays 数组常用方法
Top 10 questions of Java strings
Top 10 questions for Java regular expression
Top 10 questions about Java exceptions
Top 10 questions about Java collections
Top 9 questions about Java maps
The most widely used Java libraries
Top 10 websites for advanced level Java developers
Top 10 books for advanced level Java developers
Top 100 High-quality Java blogs
Top 10 algorithms for coding interview
Top 8 diagrams for understanding Java
Top 100 Java Classes
##10. Popular Libraries, Frameworks and Tools
Reflection tutorial
What is framework?
Why do we need Java web frameworks like Struts 2?
What is Servlet Container? What is Tomcat?
What is aspect-oriented Programming?
Library vs. framework?
Spring
Open source projects using Spring framework
Design patterns in stories
Struts 2
How CVS works?
Why do we need software testing?
Convert java jar file to exe
Guava
Log4j
JSoup
Swing
##11. Others
Compile and Run Java in Command Line with External Jars
How to build your own library?
How to get double?
Java and computer science courses
Java vs. Python: Basic Syntax, Date Types
How to write a crawler?
8 things programmers can do at weekends
Declaration, initialization and scoping
Date formatting(add more)
Path of package and class