1.2. The Java "White Paper" BuzzwordsThe authors of Java have written an influential White Paper that explains their design goals and accomplishments. They also published a shorter summary that is organized along the following 11 buzzwords:1. Si…
4.7. PackagesJava allows you to group classes in a collection called a package. Packages are convenient for organizing your work and for separating your work from code libraries provided by others.The standard Java library is distributed over a numbe…
This is a new series of sharing core Java interview question and answer on Finance domain and mostly on big Investment bank.Many of these Java interview questions are asked on JP Morgan, Morgan Stanley, Barclays or Goldman Sachs. Banks mostly asked c…
今天起开始学习Java,学习用书为Core Java.之前有过C的经验.准备把自己学习这一本书时的各种想法,不易理解的,重要的都记录下来.希望以后回顾起来能温故知新吧.也希望自己能够坚持把自己学习这本书的整个过程记录下来. I want to put a ding in the universe. 基本术语: Object Oriented Programming——OOP——面向对象编程 Application Programming Interface——API——应用程序编程接…
Java里面的String Conceptually, Java Strings are sequences of Unicode characters. Java里面的String都是Unicode字符串 Java does not have a built-in string type. java没有内建的字符串类型. Each quoted string is an instance of the String class. 每个引用的字符串都是一个String类的实例. 字符串是永恒的:…
We are sharing 25 java interview questions , these questions are frequently asked by the recruiters.Java questions can be asked from any core java topic . So we try our best to provide you the java interview questions and answers for experienced whic…
Difference between Vector and Arraylist is the most common Core Java Interview question you will come across in Collection . This question is mostly used as a start up question by the Interviewers before testing deep roots of the Collection .Vec…
所有代码均在本地编译运行测试,环境为 Windows7 32位机器 + eclipse Mars.2 Release (4.5.2) 2016-10-17 整理 下面的代码输出结果是多少?为什么?并由此总结几个编程规范. class smallT { public static void main(String args[]) { smallT t = new smallT(); int b = t.get(); System.out.println(b); } public int get()…
5.1. Classes, Superclasses, and SubclassesLet's return to the Employee class that we discussed in the previous chapter. Suppose (alas) you work for a company at which managers are treated differently from other employees. Managers are, of course, jus…
4.10. Class Design HintsWithout trying to be comprehensive or tedious, we want to end this chapter with some hints that will make your classes more acceptable in well-mannered OOP circles. 1. Always keep data private. This is first and foremost; doin…
4.6. Object ConstructionYou have seen how to write simple constructors that define the initial state of your objects. However, since object construction is so important, Java offers quite a variety of mechanisms for writing constructors. We go over t…
4.5. Method ParametersLet us review the computer science terms that describe how parameters can be passed to a method (or a function) in a programming language. The term call by value(值调用) means that the method gets just the value that the caller pro…
4.4. Static Fields and MethodsIn all sample programs that you have seen, the main method is tagged with the static modifier. We are now ready to discuss the meaning of this modifier.4.4.1. Static Fields(静态域)If you define a field as static, then there…
4.1. Introduction to Object-Oriented ProgrammingObject-oriented programming, or OOP for short, is the dominant programming paradigm these days, having replaced the "structured," procedural programming techniques that were developed in the 1970s.…
3.10. ArraysAn array is a data structure that stores a collection of values of the same type. You access each individual value through an integer index. For example, if a is an array of integers, then a[i] is the ith integer in the array.Declare an a…
3.8. Control FlowJava, like any programming language, supports both conditional statements and loops to determine control flow. We will start with the conditional statements, then move on to loops, to end with the somewhat cumbersome switch statement…
3.6. StringsConceptually, Java strings are sequences of Unicode characters(Java的字符串是一个Unicode序列). For example, the string "Java\u2122" consists of the five Unicode characters J, a, v, a, and ?. Java does not have a built-in string type(Java没有内置的…
3.5. OperatorsThe usual arithmetic operators +, -, *, / are used in Java for addition, subtraction, multiplication, and division. The / operator denotes integer division if both arguments are integers, and floating-point division otherwise. Integer r…
