Java

The Aho-corasick algorithm is referred to as the AC algorithm, by preprocessing the pattern string to determine the finite state automata, the scanned text can be finished again. Its complexity is O (n), which is independent of the number and length

A. Generate Java documentation, to understand the Java comment content, if you do not know, you can look at an article. Two. The Java system provides Javadoc tools to automatically generate annotation documents based on the program structure. When

Expressions in mathematics are expressed by using generic methods and set: The orthogonal complement of the collection, which copies the first parameter set in the following three methods, and does not directly modify the set in the

Recently intends to learn the development of Android, so to prepare the Java development environment, install the JDK, it is necessary to set the Java environment variables, Java environment variables to set Java_home,path,classpath three values,

and schematic diagramCode:1 Public classCircle2 {3 Public Static voidMain (string[] args)4 {5 intRADIUS = 10;6System.out.println ("Approximate circle with output radius + radius +");7 Paint (RADIUS);8 }9 Ten Public Static

Original address: Http://yanwushu.sinaapp.com/java_serialversionuid/ Content Introduction Some Java classes that implement the Serializable interface will see a static field named Serialversionuid, which explains the

Go directly to the code.1 classLesson4ab2 //The public -decorated method under the same class, A, B, can call each other3 {4 Public voidA ()5 {6B ();//equivalent to this. B ();7 }8 Public voidB ()9 {TenA ();//equivalent to this.

1. About arraysRemember that the BinarySearch method returns the meaning of the numeric value of type int.If The array contains multiple elements with the specified value, there is no guarantee which one would be found.and returns 1 when the lookup

String teststr = "Western-style lighting is popular to enjoy the luxury of the taste"; teststr = Teststr.replaceall ("[|]", ""). Trim ();As shown in the code, directly replace all the full-width spaces in the string with a half-width space, and then

An object has only one hashcode, and hashcode of multiple objects may be the same. Source code Location: Java-source/java/lang/string.java,hashcode () Method:public int hashcode () { int h = hash; if (h = = 0 && value.length > 0) {

Daily work often encountered about the date of processing, the following to be written from a good Java code snippet to share, also as a backup, but also welcome to exchange, if you share please indicate the source, thank you.1. Returns the month

There are two ways to compress images built into Java: The image size is compressed by the getScaledInstance method of image, and its compression strategy is: Scale_default

Given numbers represented as strings, return multiplication of the numbers as a string.Note:the numbers can be arbitrarily large and is non-negative.public class Solution {//Analog hand multiplication public String multiply (string num1, String num2)

publicclassTest {    publicstaticvoidmain(String[] args) {        // 1、左移(         // 0000 0000 0000 0000 0000 0000 0000 0101 然后左移2位后，低位补0：//        // 0000 0000 0000 0000 0000 0000 0001 0100 换算成10进制为20        System.out.println(52);// 运行结果是20       

Solve the Problem of in production environments was not found on the java. library. path: xxx during tomcat startup Not found on the java. library. path and other information, you can download the tomcat-native-1.1.32-win32-bin.zip, unzip, the

Shiro, apacheshiro Define shiroFilter (org. apache. shiro. spring. web. shiroFilterFactoryBean) needs to assign a value to its filterChainDefinitions property. This property is a chainName-to-chainDefinition map of chain definitions, used to define

Thinking in Java Enumeration All enumeration classes are subclasses of java. lang. Enum, so custom enumeration classes cannot inherit other classes. Common enumeration methods: Values (): Is the static method added by the compiler to

JAVA learning lesson 55th-IO stream (9) file cutting Synthesizer File Cutter Private static final int SIZE = 1024*1024; public static void splitFile (File file) throws IOException {// read the stream associated File (the file format is not

Binary Search function Find and return to the lower mark; int binary_search(const int* a, int low_position, int high_position, const int key){ high_position--; while(low_position > 1; if(a[mid_position] == key) return mid_position;

Inverted output of linked list The inverted output of the linked list, which we may think of, is to flip the linked list and traverse it again. In this case, the time complexity is O (n), but the disadvantage is that the Code is slightly complicated.