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import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;

import javax.swing.JApplet;


public class NoBufferMovingCircle extends JApplet implements Runnable{
 Image screenImage = null;
 Thread thread;
 int x = 5;
 int move = 1;
 
 public void init(){
 screenImage = createImage(230,160);
 }
 
 public void start(){
 if(thread == null){
 thread = new Thread(this);
 thread.start();
 }
 }
 
@Override
public void run() {
// TODO Auto-generated method stub
try{
System.out.println(x);
while(true){
x+=move;
System.out.println(x);
if((x>105)||(x<5)){
move*=-1;
}
repaint();
Thread.sleep(10);
}
}catch(Exception e){

}
}

public void drawCircle(Graphics gc){
Graphics2D g = (Graphics2D) gc;
g.setColor(Color.GREEN);
g.fillRect(0, 0, 200, 100);
g.setColor(Color.red);
g.fillOval(x, 5, 90, 90);
}

public void paint(Graphics g){
g.setColor(Color.white);
g.fillRect(0, 0, 200, 100);
drawCircle(g);
}

}

import java.awt.Color;
import java.awt.Graphics;


public class BufferMovingCircle extends NoBufferMovingCircle{
 Graphics doubleBuffer = null;//緩沖區
 
 public void init(){
 super.init();
 doubleBuffer = screenImage.getGraphics();
 }
 
 public void paint(Graphics g){//使用緩沖區，優(yōu)化原有的 paint 方法
 doubleBuffer.setColor(Color.white);//先在內存中畫(huà)圖
 doubleBuffer.fillRect(0, 0, 200, 100);
 drawCircle(doubleBuffer);
 g.drawImage(screenImage, 0, 0, this);
 }
}

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;


public class StreamVSBuffer {
 public static void streamMethod() throws IOException{
 try {
long start = System.currentTimeMillis();
//請替換成自己的文件
 DataOutputStream dos = new DataOutputStream(
                        new FileOutputStream("C:\\StreamVSBuffertest.txt"));
for(int i=0;i<10000;i++){
dos.writeBytes(String.valueOf(i)+"\r\n");//循環(huán) 1 萬(wàn)次寫(xiě)入數據
}
dos.close();
DataInputStream dis = new DataInputStream(new FileInputStream("C:\\StreamVSBuffertest.txt"));
while(dis.readLine() != null){
 
}
dis.close();
 System.out.println(System.currentTimeMillis() - start);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
 
 }
 
 public static void bufferMethod() throws IOException{
 try {
 long start = System.currentTimeMillis();
 //請替換成自己的文件
 DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(
                                        new FileOutputStream("C:\\StreamVSBuffertest.txt")));
 for(int i=0;i<10000;i++){
 dos.writeBytes(String.valueOf(i)+"\r\n");//循環(huán) 1 萬(wàn)次寫(xiě)入數據
 }
 dos.close();
 DataInputStream dis = new DataInputStream(new BufferedInputStream(
                                        new FileInputStream("C:\\StreamVSBuffertest.txt")));
 while(dis.readLine() != null){
 
 }
 dis.close();
 System.out.println(System.currentTimeMillis() - start);
 } catch (FileNotFoundException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 
 public static void main(String[] args){
 try {
StreamVSBuffer.streamMethod();
StreamVSBuffer.bufferMethod();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
 }
}

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31

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;


public class WriterVSBuffer {
 public static void streamMethod() throws IOException{
 try {
long start = System.currentTimeMillis();
 FileWriter fw = new FileWriter("C:\\StreamVSBuffertest.txt");//請替換成自己的文件
for(int i=0;i<10000;i++){
fw.write(String.valueOf(i)+"\r\n");//循環(huán) 1 萬(wàn)次寫(xiě)入數據
}
fw.close();
FileReader fr = new FileReader("C:\\StreamVSBuffertest.txt");
while(fr.ready() != false){
 
}
fr.close();
 System.out.println(System.currentTimeMillis() - start);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
 
 }
 
 public static void bufferMethod() throws IOException{
 try {
 long start = System.currentTimeMillis();
 BufferedWriter fw = new BufferedWriter(new FileWriter("C:\\StreamVSBuffertest.txt"));//請替換成自己的文件
 for(int i=0;i<10000;i++){
 fw.write(String.valueOf(i)+"\r\n");//循環(huán) 1 萬(wàn)次寫(xiě)入數據
 }
 fw.close();
 BufferedReader fr = new BufferedReader(new FileReader("C:\\StreamVSBuffertest.txt"));
 while(fr.ready() != false){
 
 }
 fr.close();
 System.out.println(System.currentTimeMillis() - start);
 } catch (FileNotFoundException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 
 public static void main(String[] args){
 try {
StreamVSBuffer.streamMethod();
StreamVSBuffer.bufferMethod();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
 }
}

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31

import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
/**
 * 第一步：生成 CacheManager 對象
 * 第二步：生成 Cache 對象
 * 第三步：向 Cache 對象里添加由 key,value 組成的鍵值對的 Element 元素
 * @author mahaibo
 *
 */
public class EHCacheDemo{

public static void main(String[] args) {
 //指定 ehcache.xml 的位置
 String fileName="E:\\1008\\workspace\\ehcachetest\\ehcache.xml";
 CacheManager manager = new CacheManager(fileName);
 //取出所有的 cacheName
 String names[] = manager.getCacheNames();
 for(int i=0;i<names.length;i++){
 System.out.println(names[i]);
 }
 //根據 cacheName 生成一個(gè) Cache 對象
 //第一種方式：
 Cache cache=manager.getCache(names[0]);
 
 //第二種方式，ehcache 里必須有 defaultCache 存在,"test"可以換成任何值
// Cache cache = new Cache("test", 1, true, false, 5, 2); 
// manager.addCache(cache); 
 
 //向 Cache 對象里添加 Element 元素，Element 元素有 key，value 鍵值對組成
 cache.put(new Element("key1","values1"));
 Element element = cache.get("key1");
 
 System.out.println(element.getValue());
 Object obj = element.getObjectValue();
 System.out.println((String)obj);
 manager.shutdown();
 

 }


}

<Resource name="jdbc/dbsource" 
 type="com.mchange.v2.c3p0.ComboPooledDataSource" 
 maxPoolSize="50" minPoolSize="5" acquireIncrement="2" initialPoolSize="10" maxIdleTime="60"
 factory="org.apache.naming.factory.BeanFactory" 
 user="xxxx" password="xxxx" 
 driverClass="oracle.jdbc.driver.OracleDriver" 
 jdbcUrl="jdbc:oracle:thin:@192.168.x.x:1521:orcl" 
 idleConnectionTestPeriod="10" />

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass"><value>oracle.jdbc.driver.OracleDriver</value></property>
<property name="jdbcUrl"><value>jdbc:oracle:thin:@localhost:1521:Test</value></property>
<property name="user"><value>Kay</value></property>
<property name="password"><value>root</value></property>
<!--連接池中保留的最小連接數。-->
<property name="minPoolSize" value="10" />
<!--連接池中保留的最大連接數。Default: 15 -->
<property name="maxPoolSize" value="100" />
<!--最大空閑時(shí)間,1800 秒內未使用則連接被丟棄。若為 0 則永不丟棄。Default: 0 -->
<property name="maxIdleTime" value="1800" />
<!--當連接池中的連接耗盡的時(shí)候 c3p0 一次同時(shí)獲取的連接數。Default: 3 -->
<property name="acquireIncrement" value="3" />
<property name="maxStatements" value="1000" />
<property name="initialPoolSize" value="10" />
<!--每 60 秒檢查所有連接池中的空閑連接。Default: 0 -->
<property name="idleConnectionTestPeriod" value="60" />
<!--定義在從數據庫獲取新連接失敗后重復嘗試的次數。Default: 30 -->
<property name="acquireRetryAttempts" value="30" />
<property name="breakAfterAcquireFailure" value="true" />
<property name="testConnectionOnCheckout" value="false" />
</bean>

a=a+b;
b=a-b;
a=a-b;

public class UnsignedByte {
 public short getValue(byte i){//將 byte 轉為無(wú)符號的數字
 short li = (short)(i & 0xff);
 return li;
 }
 
 public byte toUnsignedByte(short i){
 return (byte)(i & 0xff);//將 short 轉為無(wú)符號 byte
 }
 
 public static void main(String[] args){
 UnsignedByte ins = new UnsignedByte();
 short[] shorts = new short[256];//聲明一個(gè) short 數組
 for(int i=0;i<shorts.length;i++){//數組不能超過(guò)無(wú)符號 byte 的上限
 shorts[i]=(short)i;
 }
 byte[] bytes = new byte[256];//使用 byte 數組替代 short 數組
 for(int i=0;i<bytes.length;i++){
 bytes[i]=ins.toUnsignedByte(shorts[i]);//short 數組的數據存到 byte 數組中
 }
 for(int i=0;i<bytes.length;i++){
 System.out.println(ins.getValue(bytes[i])+" ");//從 byte 數組中取出無(wú)符號的 byte
 }
 }
}

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import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;


public class SpaceSort {
 public static int arrayLen = 1000000;
 
 public static void main(String[] args){
 int[] a = new int[arrayLen];
 int[] old = new int[arrayLen];
 Map<Integer,Object> map = new HashMap<Integer,Object>();
 int count = 0;
 while(count < a.length){
 //初始化數組
 int value = (int)(Math.random()*arrayLen*10)+1;
 if(map.get(value)==null){
 map.put(value, value);
 a[count] = value;
 count++;
 }
 }
 System.arraycopy(a, 0, old, 0, a.length);//從 a 數組拷貝所有數據到 old 數組
 long start = System.currentTimeMillis();
 Arrays.sort(a);
 System.out.println("Arrays.sort spend:"+(System.currentTimeMillis() - start)+"ms");
 System.arraycopy(old, 0, a, 0, old.length);//恢復 原有數據
 start = System.currentTimeMillis();
 spaceTotime(a);
 System.out.println("spaceTotime spend:"+(System.currentTimeMillis() - start)+"ms");
 }
 
 public static void spaceTotime(int[] array){
 int i = 0;
 int max = array[0];
 int l = array.length;
 for(i=1;i<l;i++){
 if(array[i]>max){
 max = array[i];
 }
 }
 int[] temp = new int[max+1];
 for(i=0;i<l;i++){
 temp[array[i]] = array[i];
 }
 int j = 0;
 int max1 = max + 1;
 for(i=0;i<max1;i++){
 if(temp[i] > 0){
 array[j++] = temp[i];
 }
 }
 }
}