what is api in java

The string type is a commonly used type in the actual work, separated from the data type, string is a reference type and is a class defined in the API. So objects of type string can be created using new, such as String Name=new string ("string"), assigning the variable name to a value of "string", but string analogy ot

Just looking at the annotations in Java and always saying that annotations introduce a Java bean, I'm going to ask, what is a Java bean?By reference: https://www.zhihu.com/question/19773379 under Tiansheng's answerThe Java languag

Original link: http://zhidao.baidu.com/link?url=16TEzhom2Nr8x1_ 2utrp-e2pgzrgs5nw5ywtrx2xlhbtlog8btif5dtyp85jftomj4qjkzxqlb-8x4avmz7rp7skelvdwfkbqyei4erdbjiSocket is the original socket development interface in Winsock Api,c++/java they are the language of development, and the socket is a communication standard abbrevi

Click to enter _ more _java FAQ-base Class Library1. What is the function of Lang packageThe Java.lang package is the core of the Java language and provides the underlying classes in Java. The basic classes include the Basic object class, the class class, the string class, t

from 32,768 ( -2^15) to 32,767 (2^15-1), when the variable is initialized, the default value for the short type is 0, and generally, because the Java itself transforms, it can be directly written as 0. The int:int is stored in 4 bytes with a range of-2,147,483,648 ( -2^31) to 2,147,483,647 (2^31-1), and the defaul

Click to enter _ many other _java thousand ask1. What is coverageIn Java, overrides are the concept of inheritance, where a subclass needs some method or property, but does not want to use a method or property of the same name in the parent class.In a straightforward sense. is to write a method in a subclass that has t

Previously learned Thread-safe Classes:Stringbuffer: A variable sequence of characters for thread Safety. A String string buffer that is similar to, but cannot be modified.Vector: Vector classes can implement an array of objects that can grow.Hashtable: This class implements a hash table that maps the keys to the corresponding Values. Any non- null object can be used as a key or a Value.1 // Thread-safe Classes 2 New StringBuffer (); 3 New vector(); 4

Click to enter _ more _java thousand ask1. What is Javaapplet?Applets are small applications written in the Java programming language, which can be contained in HTML (an application of the standard Universal Markup Language) page, in much the same way as the page contains images. The applet does not require the main () method, which

The question comes from a netizen's question I am now engaged in the development of Java, My Foundation: Java Foundation (not strong, very superficial), JS script sometimes used, struts1. X, simple Oracle operation, simple Linux/unix use,. My question: 1.java can be engaged in which aspects of the open, from the application areas, such as Web sites, search tech

What is AOP in the Java programmer interview test book? A programmer interview test book AOP (Aspect-Oriented Programming) is a supplement to object-oriented development, it allows developers to dynamically modify the model without changing the original model to meet new requirements. For example, you can dynamically a

Under what circumstances is Java faster than C ++? Reviewer: Cameron Purdy, Senior Oracle middleware engineer. This is based on what I learned more than 20 years after using C ++ and Java at the same time. In fact, using

Click to enter _ more _java thousand ask1. What is the Main method?There is a main () method in a class, which means that this is a Java application that can start the running program directly (the JDK or JRE is installed in the o

Click to enter _ many other _java thousand ask1. What is the difference between an interface and an abstract class?In the Java language. Abstract class and interface interface are two mechanisms of abstract definition.It is the existence of these two mechanisms that gives Java