Java

1. Result of thread interruption professional terminology Isinterrupted interrupted interrupt Tests if the front thread has been interrupted, and the interrupt state is canceled Thread.interrupted (); Adding an interrupt token to the current thread *

Two days ago the school broke the net, failed to write in time, today summed up the rest of the internal classes learned.1. Inner classes declared as static are generally referred to as nested classes. An ordinary inner class object implicitly holds

Define a traffic light enumeration class, including red, green, yellow lights, need to get the next light method, and to achieve a red light 5 seconds after the turn of the green light, green 3 seconds after the yellow lamp, yellow light after 2

1. Practice: Store 5 student objects in a collection and traverse the student objects.Analysis:(1) Create student class(2) Creating a Collection Object(3) Create student objects(4) Add students to the collection(5) Turn the set into a group(6)

First, socket construction methodSocket ()Socket (inetaddress address, int port) throws Unknowhostexception, IOExceptionSocket (inetaddress address, int port, inetaddress localaddr, int localport) throws IOExceptionSocket (String host, int port)

Processes and ThreadsWhen it comes to multithreading, you have to first talk about the concepts of processes and threads.ProcessA process can be understood as a basic unit of operation managed by the operating system. 360 browser is a process, WPS

Beijing Institute of Electronic TechnologyReal Inspection report Course: Mobile Platform Application development Practice class: 201592 Name: Souzenan No.: 20159207Score: Instructor: Lou Jia Peng Experimental Date: 2015.9.28Experiment level:

One. Thread state type1. New state: A new Thread object was created.2. Ready state (Runnable): After the thread object is created, other threads call the object's start () method. The state of the thread is located in a pool of running threads that

1. Listiterator (List iterator):Listiterator Listiterator (): A list collection-specific iterator2. code example:1 Packagecn.itcast_04;2 3 Importjava.util.ArrayList;4 ImportJava.util.Iterator;5 Importjava.util.List;6 ImportJava.util.ListIterator;7 8

ObjectiveDeadlocks write a separate article because it is a serious problem that must be brought to the attention of the individual. This is not an exaggeration of the risk of a deadlock, although the lock is usually held for a short time, the

1. Features of the list collectionThe list itself is also an interface, as follows:1 Public Interface List extends collection(1) List is an ordered collection (also known as a sequence), where the user of this interface can precisely control

Public class test {  public static void main (String[] args)   Throws classnotfoundexception {    // system.out.println (Class.forName (" Java.lang.String "). getClassLoader ());     // system.out.println (Class.forName (" Java.lang.Object ").

First, the use of beanutilsBeanutils The main problem: encapsulating the object's attribute data into an object.Benefits of Beanutils:1. Beanutils when setting a property value, Beanutils automatically helps me convert the data type if the property

Protected class LoadClass (String name, Boolean resolve) throws classnotfoundexception{//plus lock, synchronous processing because it can be Can be multithreaded in the Load class synchronized (Getclassloadinglock (name)) {//check if the class has

When you migrate an Eclipse project, you encounter"Project facet Java version 1.7 is not supported."the jdk1.7 in the project is not supported. Note that the project was compiled by other versions of the JDK and is not supported when running in

The queue interface is the same level as list and set, and both inherit the collection interface. LinkedList implements the queue interface. The queue interface narrows the access to the LinkedList method (that is, if the parameter type in the

1, why do I need concurrency?There is no operating system in the earlier computer, a computer executes only one program from beginning to end, if the task of the program is to perform CPU calculation before writing the result to the file. Then, when

1. Object-orientedObject-oriented: Three features: encapsulation, inheritance, polymorphismClass and object relationship classes are: a description of things in real life. Object: It is this kind of thing, the real existence of the individual.1

the properties and methods in System are static. In: standard input, default keyboard out: Standard output, default console GetProperties: System Information System.setproperty ("MyKey", "myvalue") String System.getproperty (" MyKey ")Runtime does

Collections: A tool class that operates exclusively on a collection. All methods are static, the construction method is private, the object cannot be created, through COLLECTIONS.XXX (), and the method in the tool class is invoked.   1,