各位大侠，帮助下啊

[pody]

import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.*;


public class No17 {

public class Datetime{
private Date today;
private SimpleDateFormat sdf;

today = new Date();
sdf=new SimpleDateFormat("EEEE MMMM dd,yyyy");

public void showtime(){
JOptionPane.showMessageDialog(null, sdf.format(today));
}
}

public static void main(String[] args) {

Datetime today=new Datetime();
today.showtime();
}
}

错误显示:systax error on "=" "Identifier"expected

[thegodofwar]

package liufukun;

import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.*;

class Datetime {
	private Date today;
	private SimpleDateFormat sdf;

	Datetime() {
		today = new Date(System.currentTimeMillis());
		sdf = new SimpleDateFormat("EEEE MMMM dd,yyyy");
	}

	public void showtime() {
		JOptionPane.showMessageDialog(null, sdf.format(today));
	}
}

public class TextSimpleDateFormat {

	public static void main(String[] args) {

		Datetime today = new Datetime();
		today.showtime();
	}
}

测试结果：
自己看看效果