Java

radio button Jradiobutton radioButton1 = new Jradiobutton ("Java");//Create a radio buttonContentpane.add (RadioButton1);//App radio button?Jradiobutton radioButton2 = new Jradiobutton ("PHP");//Create a radio

Multithreading in Java involves the following 4 points: Java threads can be created in two ways: inheriting the tread class and implementing the Rannable interface; In the use of multithreading, you can manually instantiate a number of

Set of java Sets The set can store multiple objects, but it does not remember the storage sequence of elements or allow repeated elements in the set (different set sets have different judgment methods ).   1.HashSet class HashSet stores elements in

The array is in the form of a collection. 1. to convert an array into a List set, you can use the idea and method of the set to operate the elements in the array. Note that the addition and deletion methods of the set cannot be used, because the

Gson tips and notes I encountered something new when I was reading the project as usual. At least it was a new thing for me. Gson Not much nonsense. In my opinion, Gson is mainly used to convert objects and json. For example, if you want to

Difference between isNotEmpty and isNotBlank in StringUtils, stringutils. isblank The operation object of the StringUtils method is java. lang. string-type objects are complementary to the String-type operation method provided by JDK, and are

List set of Java sets and list of java Sets 1. What is an Lsit collection? A List set is an ordered and repeatable set of elements. Each element in the SET has its own element index. The List set allows repeated elements. You can use indexes to

SpringMVC Exception Handling To handle exceptions during code running in a unified manner and provide a user-friendly exception interface, springMVC's exception handling function needs to be introduced. To demonstrate this function, this article

Insert sorting directly and sort by hillWhy is the code similar !! /* Name: InsertSortCopyright: Author: huowolf Date: 05/07/15 16: 18 Description: directly Insert the sorting implementation */# include Using namespace std; int arr [] = {-, 98};

Considerations when using an exclusive or operation to implement reverse array settings Using the element exchange function to reverse the array is very easy, as shown in the following code: (element exchange between the left and right

Java Web Verification Code1. RandomCode RandomCode is a tool class for generating verification codes. It supports both English and digital verification codes. The verification codes include uppercase and lowercase letters and arrays. English I, o,

Basic link stack operations Basic stack concepts:Stack is a linear table (or single-chain table) that is limited to insert or delete operations at the end of the table ).// You can only insert and delete segments, so they do not exist. insert them

Hibernate -- CirclesOfImage ApplicationPurpose: The requirement is to find all the circles in an image and save them to the database.Therefore, the database is designed for an image,Save its image name (the image is stored in a unified directory, so

Six design principles of design patternsI. Single Respnsibility Principle SRP the Single responsibility Principle is defined as: there should be only one reason for class changes. Benefits of a single responsibility principle: 1. The complexity of

Design Pattern-Demeter's law (dump/LKP)Demeter Law: (Law of Demeter, dump), also known as the Least Knowledge Principle (LKP)Understanding:If the two classes do not need to communicate with each other directly, they should not interact directly. If

ThreadLocal + Cookie for java stateless login implementation Note:The stateless State mentioned in this Article refers to the absence of session authentication and user encapsulation information. Benefits of stateless: 1. Single Sign-on for multiple

Print the number of different characters in the string   Description: Find the number of different characters in the string. Question category: String Difficulty: Elementary Running time limit:

LeetCode101 SynmetricTree Java question Question:   Given a binary tree, check whether it is a mirror of itself (ie, shortric around its center ). For example, this binary tree is unsupported Ric: 1 / \ 2 2 / \ / \3 4 4 3   But the

Java-Thinking in Java chapter 2nd exercisesThinking in Java1 //: object/HelloDate.java/** * Default initialize class. * @author C.L.Wang * @author Caroline Wendy * @version 1.0 */public class Main extends ShowProperties { /** * Entrv point to

Java basics: Blocking IO      Note: Before reading this article, we recommend that you first read this blog to understand the basic concepts of blocking IO and non-blocking IO.1. Stream 1. byte Stream Input (InputStream) Media Stream