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inherit it. Subclass overwrites the finalize () method to sort system resources or perform other cleanup tasks. The finalize () method is called before the Garbage Collector deletes an object.
Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?
An anonymous internal class is an internal class without a name. It cannot be extends (inherited) other classes, but an internal class can be used as an in
finalize () method to sort system resources or perform other cleanup tasks. The finalize () method is called before the Garbage Collector deletes an object.
Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?
An anonymous internal class is an internal class without a name. It cannot be extends (inherited) other classes, but an internal class can be used as an interface and implemented by another i
More than 100 typical JAVA interview questions and answer analysis (1)
This article will discuss various types of interview questions in Java interviews, which allow employers to test candidate's
Java Questions Answers
1. What is the difference between an applet and an application?
A Java application is made up of a main () method declared as public static void that accepts a string array argument, along with any other classes that main () CILS. it lives in the environment that the Host OS provides.
A
First, let's list these 32 questions. You can leave me alone and think about what it will do if the interview feels like.
First, let's talk about the differences between final, finally, and finalize.
Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?
Third, the difference between static nested class and inner
.
}
}
56. Problem: Give an integer variable A, write two pieces of code, the first set of a bit3 is 1, the other bit does not change, how to implement it?
/**
* @author sanchan
* @since 1.0
*/
publicclassTest{
publicstaticvoidmain(String[]args){
//给一整型变量a,写两段代码,第一个设置a的bit3 为1,其他bit不变,怎么实现呢?
inta=8;
//打印二进制
System.out.println(Integer.toBinaryString(a));//输出 1000
System.out.println(Integer.toBinaryString(a|4));//输出 1100
}
take out 1 position: Product: 4 The consumer takes out from 0 position: Product: 2 producer put in 0 position: Product: 5 consumer removed from 0 Position: Product: 5 producer put in 0 position: Product: 6 consumer is removed from 0 position: Product: 6 producer put in 0 Location: Product: 7 producer puts 1 position: products £ º The producers are placed in the location of the product: 8 Position: Product Consumer removed from 1 position: Product: 9 consumer removed from 0 positions: Products:
Collector deletes an object.
13. Can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?
An anonymous internal class is an internal class without a name. It cannot be extends (inherited) other classes, but an internal class can be used as an interface and implemented by another internal class.
14. The difference between static nested class and inner class is that the more you say, the better (the more general
1. What is a Java virtual machine? Why is Java called a "platform-agnostic programming language"?A Java Virtual machine is a virtual machine process that can execute Java bytecode. The Java source file is compiled into a bytecode
are characterized by the inability to define variables, and all methods are abstract methods . abstract classes can have variables and do not enforce the need for abstract methods .Inheritance of class 16 and implementation of interfacesParsing: Class Inheriting the parent class implements the interface with the class, which is essentially the same. is to either extend or rewrite the parent class or interface as a template on this template. In practical pro
a daily sentence: Life is full of expectations, the dream of connecting the future! Java fresh or self-taught beginner's written interview topic summary, I hope that everyone has help, the topic from their own learning summary and teacher explanation, network resources, books and materials. Knock out everyone to see, every time to update the topic, I hope you can find a good job.Part I: The basic partThe un
configuration. While JavaScript is interpreted to perform without generating intermediate files, "read a sentence, execute a sentence", the execution can generally be done in three ways:1. The general browser comes with the JS interpreter, which can be used directly by the browser;2. Special interpreter software can be installed node. js, executing the. js file;3. Executed with the Web page, using the Third, the data typeJava is a strongly typed language, and when it comes to data, the declarat
Java programmer interview questions (86-115)
86. In Struts 2, how does Action obtain the data that the user inputs from the page, and how does it transmit its own data to the view?
A: There are three ways for Action to retrieve data from the page:
1) accept parameters through the Action attribute
2) obtain parameters through the domain model
3) ModelDriven
)
into the corresponding method to invoke the logical layer of the method to achieve response to the customer.There are no doget, dopost, and so on in the Servlet interface and Genericservlet, these methods are defined in HttpServlet, but all return error information, so, each time we define a servlet, Must implement these methods such as Doget or Dopost.Each custom servlet must implement the Servlet interface, and the Servlet interface defines five methods, of which the more important three meth
APIThe Java Collection Framework API is a unified framework for representing and manipulating collections, which contains interfaces, implementation classes, and algorithms that help programmers complete some programming. In short, the API does the following things on the top: more labor-efficient programming, improved City program speed and code quality, non-as
client. The expression is defined between the two tags, 9. What does the implied object mean? What are the hidden objects?JSP implied objects are some Java objects in the page, and the JSP container allows these Java objects to be used by developers. Developers can use them directly without a clear statement. JSP implicit objects are also called predefined variables. The following lists the implied objects
Do not write any scopes (that is, access rights) represent friendlyPublic, the largest, the largest scope, within the class, the same package, descendants class, other package can be accessedProtected protection, can be accessed within the class, the same package, descendant classes, but other package cannot accessFriendly friendly, within the class, the same package can be accessed, descendant class, other package cannot accessPrivate, minimal permissions, minimal scope, access within the class
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