Java 在使用smack创建聊天客户端的第一步就卡住了

我开始在smack和eclipse上使用java构建聊天客户端，因此我开始编写以下代码：

import org.jivesoftware.smack.XMPPConnection;

public class A {

// Create a connection to the igniterealtime.org XMPP server.
    XMPPConnection connection = new XMPPConnection("myserver.com");
    // Connect to the server
    connection.connect();
    // Most servers require you to login before performing other tasks.
    connection.login("admin2", "123");
public static void main(String[] args) {
    // TODO Auto-generated method stub
     A a= new A();

}

}

但我有以下两个错误：

Syntax error on token "connect", Identifier expected after this token

及

有人能帮我吗？

U不能将语句（如connection.connect（））从方法体中取出

试着这样做：

public class A 
{
    public void start()
    {
        XMPPConnection connection = new XMPPConnection("myserver.com");
        // Connect to the server
        connection.connect();
        // Most servers require you to login before performing other tasks.
        connection.login("admin2", "123");
    }
    public static void main(String[] args) 
    {
        // TODO Auto-generated method stub
        A a= new A();
        a.start();
    }
}

---

谢谢，看来我在这里也在摸索基本的东西

public class A 
{
    public void start()
    {
        XMPPConnection connection = new XMPPConnection("myserver.com");
        // Connect to the server
        connection.connect();
        // Most servers require you to login before performing other tasks.
        connection.login("admin2", "123");
    }
    public static void main(String[] args) 
    {
        // TODO Auto-generated method stub
        A a= new A();
        a.start();
    }
}