馬上就要過年了，今天是二月最后一天上班了，心情有些激動，恨不得立馬就到家去。再來公司的時候就是3.1號了，所以在離開之前把2月份的小程序們儲存起來。雖然很多都是參考了網上的小程序練習，但是自己有自己的風格，感覺存起來意義很大的，這樣堅持了兩個月不到，感覺很多基礎的東西有了更加清晰的概念，解決很多問題的時候都會到原點去想問題了。

package everyworkdayprogramming._2015_2_02;/*** * 將字符串還原成:“我要學編程”。如:我...我.要....* * */ public class Java_2_2 {public static void main(String[] args) {String str = "我我....我...我.要...要要...要學....學學..學.編..編編.編.程.程.程..程";str = str.replaceAll("\\.+", "");System.out.println("去點以后--->"+str);str=str.replaceAll("(.)\\1+", "$1");System.out.println(str);} }
package everyworkdayprogramming._2015_2_03;import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.SocketException;/*** 模擬UDP協議做一個聊天工具* * * */ public class Java_2_3_server {public static void main(String[] args) throws IOException {// 創建發送服務端DatagramSocket ds = new DatagramSocket();// 創建鍵盤錄入對象，并用轉換流轉換后高效處理BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));String s = null;while ((s = bufferedReader.readLine()) != null) {// 把每一行數據進行封裝byte[] b = s.getBytes();String str = "192.168.1.221";String[] ipStr = str.split("\\.");byte[] ipBuf = new byte[4];for (int i = 0; i < 4; i++) {System.out.println(Integer.parseInt(ipStr[i])&0xff);ipBuf[i] = (byte) (Integer.parseInt(ipStr[i]) & 0xff);}DatagramPacket dp = new DatagramPacket(b, b.length,InetAddress.getByAddress(ipBuf), 9900);ds.send(dp);}ds.close();bufferedReader.close();} }
package everyworkdayprogramming._2015_2_03;import java.net.DatagramPacket; import java.net.DatagramSocket;public class Java_2_3_receiver {public static void main(String[] args) throws Exception {// 創建接收端的服務DatagramSocket ds = new DatagramSocket(9900);// 接收數據while (true) {byte[] bye = new byte[1024];// 調用接收方法接收數據DatagramPacket dp = new DatagramPacket(bye, bye.length);ds.receive(dp);// 打印數據System.out.println(dp.getAddress()+ "發來"+ new String(dp.getData(), 0, dp.getLength()));}} }
package everyworkdayprogramming._2015_2_04;import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket;public class Java_2_4_server {/*** * * 模擬Tcp協議的傳輸過程* * */public static void main(String[] args) throws Exception {// 定義服務器接收端口ServerSocket serverSocket = new ServerSocket(65533);// 獲取服務器Socket接口Socket s = serverSocket.accept();// 獲取讀取客戶端的流BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));// 定義輸出客戶端數據的流PrintWriter printWriter = new PrintWriter(System.out, true);// 獲取反饋給客戶端的流PrintWriter pw = new PrintWriter(s.getOutputStream(), true);// 寫入到客戶端的控制臺String str = null;while ((str = br.readLine()) != null) {printWriter.println(str);// 返回數據pw.println("收到");}serverSocket.close();s.close();} }
package everyworkdayprogramming._2015_2_04;import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.PrintWriter; import java.net.Socket;public class Java_2_5_client {public static void main(String[] args) throws Exception {// 定義客戶端端口Socket socket = new Socket("192.168.1.221", 65533);BufferedReader br = new BufferedReader(new InputStreamReader(System.in));OutputStream out = socket.getOutputStream();PrintWriter pw = new PrintWriter(out, true);// 定義讀取服務器的字符流BufferedReader br1 = new BufferedReader(new InputStreamReader(socket.getInputStream()));String s1 = null;// 寫入服務器while ((s1 = br.readLine()) != null) {if ("over".equals(s1)) {break;}System.out.println("---------->"+s1);pw.println(s1);// 讀取服務器的數據String s3 = br1.readLine();System.out.println(s3);}pw.close();br.close();br1.close();socket.close();} }
package everyworkdayprogramming._2015_2_05;import java.net.InetAddress; import java.net.UnknownHostException;/*** * 通過主機名和IP地址獲得對方* * */ public class Java_2_5 {public static void main(String[] args) throws UnknownHostException {InetAddress id1 = InetAddress.getByName("mpc-pc");InetAddress id = InetAddress.getByName("192.168.1.221");String ip = id.getHostAddress();String name = id.getHostName();System.out.println(ip + "-----------------" + name);System.out.println(id1.getHostAddress() + "-----------------"+ id1.getHostName());} }

package everyworkdayprogramming._2015_2_06;import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream;/*** * java的DataOutputStream和DataInputStream* * */ public class Java_2_6 {public static void main(String[] args) throws Exception {Member member = new Member("糜鵬程", 23);DataOutputStream dataOutputStream = new DataOutputStream(new FileOutputStream("d:/member.mpc"));dataOutputStream.writeUTF(member.getName());dataOutputStream.writeInt(member.getAge());// 所有數據到目的地dataOutputStream.flush();// 關閉流dataOutputStream.close();DataInputStream dataInputStream = new DataInputStream(new FileInputStream("d:/member.mpc"));System.out.println(dataInputStream.readUTF());dataInputStream.close();} }
package everyworkdayprogramming._2015_2_06;public class Member {private String name;private int age;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public Member(String name, int age) {super();this.name = name;this.age = age;}public Member() {super();}}
package everyworkdayprogramming._2015_2_09;import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOError; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.io.Reader;public class Java_2_9 {/*** * 實現一個包裝類,讓讀出的每一行自動加上行號和:號* * @throws FileNotFoundException* * */public static void main(String[] args) throws Exception {File file = new File("d:" + File.separator + "hello2.txt");Test read = new Test(new InputStreamReader(new FileInputStream(file)));File file2 = new File("d:" + File.separator + "hello22.txt");PrintWriter printWriter = new PrintWriter(file2);String tem ;while((tem=read.myReadLine())!=null){printWriter.println(tem);}read.close();printWriter.close();file.delete();file2.renameTo(file);} }class Test extends BufferedReader {private int lineNumber;public Test(Reader in) {super(in);}public String myReadLine() throws IOException {lineNumber++;String tme;if ((tme = super.readLine()) != null) {return lineNumber + ":" + tme;} else {return null;}}}
package everyworkdayprogramming._2015_2_10;import java.io.FileInputStream; import java.io.FileWriter; import java.io.PrintWriter; import java.util.Properties; import java.util.Set;public class Java_2_10 {/*** * 把Properties.txt中鍵為count的值改為100* * */public static void main(String[] args) throws Exception {FileInputStream fs = new FileInputStream("C:/Users/mpc/workspace/basicknowledge/src/everyworkdayprogramming/_2015_2_10/Properties.txt");Properties pp = new Properties();pp.load(fs);fs.close();System.out.println(pp.get("name"));Set<Object> set = pp.keySet();for (Object obj : set) {String s = (String) obj;if (s.equals("count")) {pp.setProperty(s, 100 + "");}}PrintWriter pw = new PrintWriter(new FileWriter("C:/Users/mpc/workspace/basicknowledge/src/everyworkdayprogramming/_2015_2_10/Properties.txt"), true);pp.list(pw);pw.close();} }
package everyworkdayprogramming._2015_2_11;import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter;public class Java_2_11 {/*** * 鍵盤輸入轉大寫在控制臺顯示* * */public static void main(String[] args) throws Exception {BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));PrintWriter printWriter = new PrintWriter(System.out, true);String line = null;while ((line = bufferedReader.readLine()) != null) {if (line.equals("break"))break;printWriter.println(line.toUpperCase());}bufferedReader.close();printWriter.close();} }
package everyworkdayprogramming._2015_2_13;import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream;public class Java_2_13 {/*** * 用字符緩沖流復制一張圖片并記算花費時間.* * */public static void main(String[] args) throws Exception {BufferedInputStream in = new BufferedInputStream(new FileInputStream("d:result.png"));BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("d:result1.png"));long l1 = System.currentTimeMillis();byte[] bye = new byte[1024];int available = in.available();int i = 0;while ((in.read(bye)) != -1) {if (i < available / bye.length) {out.write(bye);out.flush();i++;} else {out.write(bye, 0, available % bye.length);out.flush();}}long l2 = System.currentTimeMillis();System.out.println(l2 - l1);in.close();out.close();} }
package everyworkdayprogramming._2015_2_15;import java.io.IOException; import java.io.InputStreamReader; import java.io.Reader;public class Java_2_15 {/*** * 自己模擬BufferedReader對象* * */public static void main(String[] args) throws IOException {MyBufferedReader bufferedReader = new MyBufferedReader();bufferedReader.setReader(new InputStreamReader(System.in));System.out.println(bufferedReader.myReadLine());bufferedReader.myClose();} }class MyBufferedReader {private Reader reader;public Reader getReader() {return reader;}public void setReader(Reader reader) {this.reader = reader;}// 模擬一次讀取一行數據的方法public String myReadLine() throws IOException {StringBuilder builder = new StringBuilder();int ch = 0;while ((ch = reader.read()) != -1) {if (ch == '\r') {continue;}if (ch == '\n') {return builder.toString();} else {builder.append((char) ch);}}// 沒有換行的情況if (builder.length() > 0) {return builder.toString();}return null;}// 模擬關閉方法public void myClose() throws IOException {reader.close();}}

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