Java

1. Read the example carefully: Enumtest.java, run it, analyze the running results? What conclusions can you get? Have you mastered the basic usage of enum types?public class Enumtest {public static void Main (string[] args) { Size

First, the data type1. Basic Data type:　　　　　　.  Boolean type: Boolean (True,false)　　　　　　.  Integer: Byte (-128,127), short ( -32768,32767), int ( -2147483648,2147483647), Long (- 9223372036854775808,9223372036854775807), char ( \u0000‘ , ‘\uffff )　　　

Originally deployed in Linux Java Web Environment, not a good summary, this time in the deployment process, the deployment of the process has been recorded, I hope to be helpful to everyone. The main contents include the network setup after the

Hands on Brain 1:Modulus=231-1=int. MaxValue multiplier=75=16807 c=0 It is possible to repeat after displaying 231-2 numbers.Write a method that uses the above algorithm to generate a random integer of a specified number (for example, 1000).Random

1. Method overloadingDifferent types of return values are obtained by calling different functions:Overloads of the method:* Method name is the same* Depending on the parameter type, the parameter type Order, the number of parameters to determine the

Transferred from: http://blog.csdn.net/jiyangsb/article/details/50984440The output stream in the IO stream in Java typically has the flush operation, which forces the output stream in the cache (byte stream, character stream, and so on) to be forced

1. Pure random number generatorxn+1= (aXn + c) MoD mModulus=231-1=int. MaxValuemultiplier=75=16807C=0It is possible to repeat after the number of 2^31-2 has been displayed. Hands-on brain: Write a method that uses the above algorithm to generate a

Java Event Listener-keyboard//Event Monitoring//Keyboard event Monitoring, wrote a small case, press up and down, change the position of the circle, the circle can be movedImportjava.awt.*;Importjavax.swing.*;Importjava.awt.event.*; Public

ClientImportjava.io.IOException;ImportJava.io.OutputStream;ImportJava.net.Socket;Importjava.net.UnknownHostException; Public classClientdemo {/** * @paramargs *@throwsIOException *@throwsunknownhostexception*/ Public Static voidMain (string[]

1. Polymorphism: Features that have the ability to express multiple formsParent class:Public abstract class Animal {public abstract void Say ();}Sub-class:public class Dog extends Animal {@Overridepublic void Say () {System.out.println

Arrays class:Arrays Class: A tool class that operates on an array, such as: Sort, find, and so on.(1):p ublic static string toString (int[] a) turns the array into a string(2):p ublic static void sort (int[] a) sorting an array(3):p ublic static int

//Blocking of Threads////ThreadsclassXc1Implementsrunnable{ Public voidrun () { for(inti=1;i) {System.out.println (Thread.CurrentThread (). GetName ()+ "Thread ___" +i); } }} Public classindex{ Public Static voidMain (string[] args) {//Thread 1Xc1

//priority of the thread//Thread 1classXc1Implementsrunnable{ Public voidrun () { for(inti=0;i) {System.out.println ("Thread 1___" +i); } }}//Thread 2classXc2Implementsrunnable{ Public voidrun () { for(inti=0;i) {System.out.println ("Thread 2___"

1.NumberFormat represents a formatted class of numbers NumberFormat a format class that represents numbers, that is, a number can be displayed according to local style habits. No. Method Type Describe 1

1 //application of the interface: the design pattern of the factory method2 public classTestfactorymethod {3 public Static voidmain (string[] Args) {4Iworkfactory i =Newstudentworkfactory ();5 i.getwork (). doWork ();6 7Iworkfactory I1

A: I found that the return type and the parameter type of the two methods are Different. packageHanoi Tower problem;/** Hanoi Tower problem* Xu Haojun date: 16.10.16 weather: Sunny*/ public classtowersofhanoi{//used to move a plate recursively

Hands on the brain 1Full "handwritten code implementation" random number generationPure random number generatorModulus=231-1=int. MaxValuemultiplier=75=16807C=0Once the 231-2 number is displayed, it is possible to repeat.Write a method that uses the

Reflection, java reflection Reflection mechanism of java in java: In the running state, the java reflection mechanism knows all the attributes and methods of this class for any class (class file; Any method and attribute of an object can be

Java. One-dimensional array, Java. Dimension Array One-Bit Array initialization (two methods) Array type array [] = {value 1, value 2, value 3 ...... value n }; Array type array name [] = new data type [constant value] // This method will assign the

JavaBean is automatically generated based on the table structure. The most professional and professional Table Structure Conversion Tool in history (version 11th) is the most powerful in the history of