Bubble Sort Method : A record of a small number of keywords is like a bubble stepping up, the key word larger record is like a stone sinking, each trip has one of the largest stones to the bottom.
Algorithmic Nature: (The maximum is the key point,
Copy Code code as follows:
Import Javasecuritymessagedigest;
Import javasecuritynosuchalgorithmexception;
/**
* MD5 Tool Class
*
* @author
* @version 0
*/
public class Md5util {
/**
* Md
*
* @param value The value
* @return The
Copy Code code as follows:
Public class derive extends Base
{
Private member M1 = new Member (' member 1 ');
{
System.out.println ("Initial block ()");
}
Public derive () {System.out.println ("Derive ()");}
Private member M2 = new
1, Java concurrency in practice list
Copy Code code as follows:
public class Singleton {
private Static Class Singletonholder {
public static Singleton resource = new Singleton ();
}
public static Singleton GetResource () {
Objective
In Java, an object must be properly initialized before it can be used, as specified by the Java specification.
Initialize automatically (default)
All the basic data members of a class are initialized, and the following example can be
Analysis: In order to traverse a list in reverse order, first of all to get a Listiterator object, using the for () loop, the Listiterator class Hasnext () method as a judgment condition, through the loop to execute the Listiterator class next ()
1. Some common methods of string in Java
Copy Code code as follows:
/**
*
*/
Package Com.you.model;
/*** @author Administrator* @date 2014-02-24*/public class Replace {
/*** @param args*/public static void Main (string[] args){/
Copy Code code as follows:
public class Reflextest {
public static void Main (string[] args)
Throws ClassNotFoundException, Nosuchmethodexception, SecurityException,
Illegalaccessexception, IllegalArgumentException,
See this is a good explanation, so turn around
There are 3 classes in Java that are responsible for the operation of characters.
1.Character is a single character operation,
2.String operation on a string of characters, immutable class.
Ideas are as follows:
Use interface to define an interface that defines the save () method in the interface;Define the different classes according to the picture format, and use the keyword implements to implement the interface respectively in
Copy Code code as follows:
Package airthmatic;
public class Demo10 {
public static void Main (string[] args) {
Double n[]={9,1.2,5,3.2,1.1};
Ordernum (n);
}
/**
* Double and int numeric sorting
* @param n
*/
public static void
Classification of binary trees (by storage structure)
Classification of trees (by storage structure)
Sequential storage (with an array representation (static binary tree))Chained-type storage
Some special two fork roots:
Complete binary tree,
The role of condition is to control the lock more precisely. The await () method in condition is equivalent to the wait () method of object, and the signal () method in condition corresponds to the Notify () method of object, condition in Signalall (
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