Java

1. Java Comment: single-line comment, multiline comment, document commentDocument comments: Execute Javadoc, generate HTML-formatted code reports;Multi-line annotations do not allow nesting.2. Identifier naming specificationPackage name: all words

-------Android Training, Java training, look forward to communicating with you! ----------TCP and UDP differencesUDP protocol: 1, data, source address, destination address are encapsulated into a packet, no need to establish a connection. 2, each

Usually more accustomed to the use of XML files to add layouts and controls, the use of Java code in the activity to add controls is also a way, the following simple example: two.1, AddcontentviewThe Addcontentview function is similar to

Java ClassLoader is used to dynamically load class, ClassLoader to a class will only be loaded once, the JVM uses a total of 4 kinds of ClassLoader:Starts the class loader, the standard extension class loader, the Classpath loader, and the network

Select boxes, Radio boxes, and radio buttons are select components, select components in two states, one is checked (on), the other is unchecked (off), and they provide a simple "on/off" selection feature that allows the user to choose between a set

1. Optimized for logging: logback, precompiled form logging, development debug, production info, access log and error log separate, Exception log output to a separate file2. Optimization for database connections: Singleton mode or database

Beijing Institute of Electronic Technology (BESTI)Real Inspection report Lesson: Java Programs and Design class: 1352Name: Shang JiaStudy No.: 20135202 20135236Score: Instructor: Lou Jia Peng Experimental Date: 2015.6.9Experiment level: Preview

Given an array of integers and a integer K, find out whether there there is II distinct indices i and J in the array such that nums[i] = Nums[j] and the difference between I and J are at M OST K.Problem Solving Ideas:The Hashmap,java is implemented

1. What is dynamic loadingClass Loaders is a mechanism for dynamically loading Java classes and resource. It supports the 4 features of Laziness,type-safe linkage,user-defined extensibility and multiple communicating namespaces.Lazy loading:class

Find all possible combinations of k numbers this add up to a number n, given this only numbers from 1 to 9 can be used and Each combination should is a unique set of numbers.Ensure that numbers within the set is sorted in ascending order.Example

Given an array of integers, find if the array contains any duplicates. Your function should return TRUE if any value appears at least twice in the array, and it should return FALSE if every ele ment is distinct.Problem Solving Ideas:The Hashmap,java

The thread state is identified in Java by an internal enumeration of the thread.NEW---->runnable---->blocked---->waiting---->timed_waiting---->terminated1. Creation status (Thread.State.NEW)If you just create a thread and do not start it (start),

The thread state is identified in Java by an internal enumeration of the thread.NEW---->runnable---->blocked---->waiting---->timed_waiting---->terminated1. Creation status (Thread.State.NEW)If you just create a thread and do not start it (start),

/** * Two pointers, one to go first k-1 step, and then two to move backwards, when the advance pointer moves to the tail of the list, the backward pointer is exactly the node to be found * @param root * @param k * @return */public static ListNode

Problem One: Copyonwritearraylist cannot be cast to ArrayListWorkaround: Pass copyonwritearraylist into the ArrayListArrayList arrayList = new ArrayList(list);Issue two: Copyonwritearraylist does not support Collections.sortWorkaround:new

Simple algorithm in single-linked list/** * Get two single-linked list of common nodes * first to find out the length of the two linked lists, and find the difference between the two dif, two pointers to the list head, respectively, so that the

public class SqList {private int[] data;private int length;public sqlist () {data = new Int[30];length = 0;} public Boolean empty () {return length = = 0;} public int Length () {return length;} public void display () {int i;for (i=0; ilength) {ARR[0]

JDK source code: String, StringBuffer, StringBuilder, stringbuilder String is the most commonly used in work, but it is still difficult to use it in many cases. It is necessary to analyze it as a whole. If you have read Thinking in java and read the

JAVA basics-character encoding Character encoding I. OverviewInputStreamReaderOutputStreamWriterThe character conversion stream is a bridge between the byte stream and the byte stream.Encoding conversion. Ii. Origin of the encoding tableComputers

Design Mode Study Notes-simple factory ModeBackground: During the development process, a large number of objects are often created, and a series of initialization operations are involved after the object is created, and we do not necessarily just