在
Java中,我如何获得一个开放的套接字？我有2个JFrame;在第一个JFrame中,我打开了Client socket的连接.在同一个JFrame中,我创建了另一个JFrame(JFrame2)的实例.现在我想从JFrame1获取相同的Socket到JFrame2继续与我的服务器Socket交谈：
login.java(First JFrame)
try {
cliente = new Socket("localhost", 4444);
salida = new ObjectOutputStream(cliente.getOutputStream());
entrada = new ObjectInputStream(cliente.getInputStream());
} catch (UnknownHostException e) {
System.err.println("Don't know about host: localhost.");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to: localhost.");
System.exit(1);
}
login.java(第一个Jframe)
try {
while ((mensaje_entrada=(String)entrada.readObject()) != null) {
try {
me=td.encrypt(mensaje_entrada);
m2=td.decrypt(me);
} catch (Exception ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}
System.out.println("e:"+ me);
System.out.println("de:"+ m2);
System.out.println(mensaje_entrada);
if(mensaje_entrada.equals("20")){
mensaje_salida=""+txt_usuario.getText()+","+txt_password.getText();
System.out.println(mensaje_salida);
salida.writeObject( mensaje_salida );
salida.flush();
mensaje_entrada=(String)entrada.readObject();
System.out.println(mensaje_entrada);
if(mensaje_entrada.equals("1")){
m.setLocationRelativeTo(null);
m.setVisible(true);
//JOptionPane.showMessageDialog(this,"Funciona!!");
break;
}else if(mensaje_entrada.equals("2")){
JOptionPane.showMessageDialog(this,"Usuario o contraseña incorrecta!","Error!",JOptionPane.ERROR_MESSAGE);
break;
}
}
}
} catch (EOFException ex) { //This exception will be caught when EOF is reached
System.out.println("End of file reached.");
} catch (ClassNotFoundException ex) {
JOptionPane.showMessageDialog(this,ex.getMessage());
} catch (IOException ex) {
JOptionPane.showMessageDialog(this,ex.getMessage());
}
最佳答案 请看一下
Singleton的实现
有了它,您可以从任何地方以优雅的方式访问您的对象,并保证它将被唯一地实例化.
遵循单例方法的简单实现：
package foo.bar;
import java.io.IOException;
import java.net.Socket;
public final class MySingletonSocket extends Socket {
private static Socket clientSocket;
static {
try {
clientSocket = new MySingletonSocket("localhost", 4444);
} catch (Exception e) {
e.printStackTrace();
}
}
private MySingletonSocket(final String address, final int port) throws IOException {
super(address, port);
}
public static final Socket getInstance() {
return clientSocket;
}
}
从JFrame1您可以访问它,如：
MySingletonSocket.getInstance()
从JFrame2,您可以以相同的方式访问它.
