Java

Producer consumer problem is one of the classic problems in the research of multithreaded process, it describes a buffer as a storehouse, the producer can put the product into the storehouse, and the consumer can take the product from the storehouse.

Package test; Class OBJ implements cloneable{ private int aint=0; public int Getaint () {return aint; } public void Setaint (int intl) { aint=intl; } public void Changeint () { this.aint=1; } public Object Clone () { object o=null;

To speak of stacks, heaps, method areas, and constant pools in Java, mention Hotspot,hotspot is the virtual machine that is in the sun jdk and Open JDK. (The code implementation is essentially the same except for the annotations of the Sun JDK and

Preface Landlord this title actually has a kind of death flavor, why, these three things can be divided into three articles to write, but, the landlord that these three things are highly relevant, should be in a knowledge point. Understand these

Click to enter _ more _java thousand ask 1, what is the data type The Java language is statically typed (statical typed), in other words, the type of all variables and expressions is completely determined when compiled. Because it is statical typed,

Retrieve password SMS verificationThe project to modify the password need mobile phone message verification, because Ali big fish texting fast, stable, so decided to use Ali big fish. Nonsense not to say, the steps are as follows: 1. First login to

Brief Introduction Stack is a linear storage structure that has the following characteristics:1. The data in the stack is in and out of the stack in accordance with the "LIFO (LIFO, last in-first)" mode.2. When adding/deleting data to the stack,

Java.lang class Integer Java.lang.Object Java.lang.Number Java.lang.Integer all implemented interfaces: Serializable, comparable Public final class Integer Extends number Implements Comparable The Integer class wraps a value of the base

Java use Apache POI Export-note front-end do not use AJAX asynchronous request, if you want to eject the file download box, do not use asynchronous download. apahce POI POM Configuration org.apache.poi poi 3.9 org.apache.poi

Java right to do string encoding conversion The internal representation of the string. Strings are uniformly represented in Unicode (that is, utf-16 LE) in Java. For String s = "Hello Oh!"; If the source file is GBK encoded and the operating system (

Java deserialization principle-demo (ii) 0x00 test code and run resultsTest code:Package Test;import Java.io.bytearrayinputstream;import Java.io.bytearrayoutputstream;import java.io.IOException; Import Java.io.objectinputstream;import

CentOS7 start Kafka When the failure, reported abnormal:Java.net.UnknownHostException:maven:maven:Temporary failure in name resolutionI don't know where to go with a MAVEN host, using the default Kafka configuration file, Google can not search for

See the big God on the Internet a blog post on whether the Java language has a value type, which mentions that "Java has only reference types (reference type), but according to Java's official documentation, Java also has the difference between a

Java main class M can directly access its own private members, even if the new one in main itself, is only a local variable in its own static method, the local variable can still access its own private members, as long as the local variable body in

Basic Java Tutorial: Multi-Threaded Foundation (2)--thread-between-threads communication After the communication between the threads, the interaction between the systems is more powerful, while greatly improving the CPU utilization, it also

Content:(1) Data type(2) operator(3) Branching structure1. Data type　　Basic data types in the Java language: Byte, short, int, long, float, double, Boolean, Char.1.1 Boolean type　　The types of false and true information described in the Java

Code block: In Java, use the code enclosed in {} to become a block of codeDepending on its location and declaration, it can be divided into local code blocks: local locations, which are used to define the life cycle of a variableConstruct code block:

Keyword: Java object referenceJava objects and their referencesSome basic concepts between objects and references.Beginner Java, for a long time, always feel that the basic concept is very vague. Later, in many Java books, the references to objects

Functional Interface Overview: There is only one abstract method in the interfaceThe following may be very abstract, can not understand, at least in my opinion, the individual excuses are useless, with the bottom of the stream stream to use in order

AWT (Abstract window Toolkit), the Chinese translation of the Abstraction Windows Toolkit, which provides an interface for interacting with the local graphical interface, is the basic tool provided by Java for creating and setting up a graphical