import java.io.*;
import java.net.*;public class JustOne {
SimpleDummyServer sds = null; public static void main(String args[]){
new JustOne().doit();
} public void doit() {
try {
Socket clientSocket = new Socket("localhost", SimpleDummyServer.port);
System.out.println("*** Already running!");
System.out.println("Program Exit!");
System.exit(1);
}
catch (Exception e) {
e.printStackTrace();
sds = new SimpleDummyServer();
sds.start();
}
while(true) {
try { System.out.print("runing..."); Thread.sleep(1000); }
catch(Exception e) { e.printStackTrace(); }
}
}
}================================================================
import java.io.*;
import java.net.*;public class SimpleDummyServer extends Thread {
// you may need to customize this for your machine
public static final int port = 80 ; ServerSocket serverSocket = null;
Socket clientSocket = null; public void run() {
try {
// Create the server socket
serverSocket = new ServerSocket(port, 1);
while (true) {
// Wait for a connection
clientSocket = serverSocket.accept();
System.out.println("*** Got a connection! ");
clientSocket.close();
}
}
catch (IOException ioe) {
System.out.println("Error in SimpleDummyServer: " + ioe);
}
}
}
import java.net.*;public class JustOne {
SimpleDummyServer sds = null; public static void main(String args[]){
new JustOne().doit();
} public void doit() {
try {
Socket clientSocket = new Socket("localhost", SimpleDummyServer.port);
System.out.println("*** Already running!");
System.out.println("Program Exit!");
System.exit(1);
}
catch (Exception e) {
e.printStackTrace();
sds = new SimpleDummyServer();
sds.start();
}
while(true) {
try { System.out.print("runing..."); Thread.sleep(1000); }
catch(Exception e) { e.printStackTrace(); }
}
}
}================================================================
import java.io.*;
import java.net.*;public class SimpleDummyServer extends Thread {
// you may need to customize this for your machine
public static final int port = 80 ; ServerSocket serverSocket = null;
Socket clientSocket = null; public void run() {
try {
// Create the server socket
serverSocket = new ServerSocket(port, 1);
while (true) {
// Wait for a connection
clientSocket = serverSocket.accept();
System.out.println("*** Got a connection! ");
clientSocket.close();
}
}
catch (IOException ioe) {
System.out.println("Error in SimpleDummyServer: " + ioe);
}
}
}
不知道这样可不可以呢?
给class OnlyInstance增加下面这个方法:
--
public OnlyInstance crashMe() {
instance = null;
instance = new OnlyInstance();
return null;
}然后, 当你象以往一样创建对象:
OnlyInstance oi = OnlyInstance.getOnlyInstance();
在不需要oi的时候可以
oi = oi.crashMe();
需要新建的时候可以
oi = OnlyInstance.getOnlyInstance();这样可以吗? 试试看, 然后告诉我答案, 谢谢!