以红绿灯为例的静态方法和延迟 （java/jframe）

问：

这应该是红绿灯的一个例子。 我的问题是我不知道如何使用延迟。（我试过了，搜索过，但没有任何帮助） 而且我不能使用“这个......”在“绿色，黄色，红色，黄色”方法中，因为它们是静态的。 该按钮应在“自动交通信号灯打开”和“关闭”之间切换。 请有人帮我解决这个问题。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.Color;
import java.util.Timer;
import java.util.TimerTask;

public class AmpelAuto extends JFrame {
  // Anfang Attribute
  private JPanel jPanelOben = new JPanel(null, true);
  private JPanel jPanelMitte = new JPanel(null, true);
  private JPanel jPanelUnten = new JPanel(null, true);
  private JButton Toggle = new JButton();
  public boolean OnOff = true;
  // Ende Attribute
  //public int OnOff = 1;

  public AmpelAuto() {   
    // Frame-Initialisierung
    super();
    setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
    int frameWidth = 412; 
    int frameHeight = 543;
    setSize(frameWidth, frameHeight);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    int x = (d.width - getSize().width) / 2;
    int y = (d.height - getSize().height) / 2;
    setLocation(x, y);
    setTitle("AmpelAuto");
    setResizable(false);
    Container cp = getContentPane();
    cp.setLayout(null);
    // Anfang Komponenten

jPanelMitte.setBounds(144, 160, 120, 120);
jPanelMitte.setOpaque(true);
jPanelMitte.setBorder(BorderFactory.createBevelBorder(0, Color.BLACK, Color.BLACK));
jPanelMitte.setBackground(Color.WHITE);
cp.add(jPanelMitte);
jPanelUnten.setBounds(144, 296, 120, 120);
jPanelUnten.setOpaque(true);
jPanelUnten.setBorder(BorderFactory.createBevelBorder(0, Color.BLACK, Color.BLACK));
jPanelUnten.setBackground(Color.WHITE);
cp.add(jPanelUnten);
jPanelOben.setBounds(144, 24, 120, 120);
jPanelOben.setOpaque(true);
jPanelOben.setBorder(BorderFactory.createBevelBorder(0, Color.BLACK, Color.BLACK));
jPanelOben.setBackground(Color.WHITE);
cp.add(jPanelOben);
Toggle.setBounds(160, 448, 80, 24);
Toggle.setText("Off");
Toggle.setMargin(new Insets(2, 2, 2, 2));
Toggle.addActionListener(new ActionListener() { 
  public void actionPerformed(ActionEvent evt) { 
    Toggle_ActionPerformed(evt);
  }
});
Toggle.setBackground(Color.RED);
Toggle.setBorder(new javax.swing.border.LineBorder(Color.BLACK, 3, true));
cp.add(Toggle);

// Ende Komponenten
setVisible(true);
  } // end of main

  // Anfang Methoden
  public static void Green() {
    this.jPanelOben.setBackground(Color.WHITE);                   //green
    this.jPanelMitte.setBackground(Color.WHITE); 
    this.jPanelUnten.setBackground(Color.GREEN);
    System.out.println("Green");
  }

  public static void Yellow() {
    this.jPanelOben.setBackground(Color.WHITE);                   //yellow
    this.jPanelMitte.setBackground(Color.YELLOW); 
    this.jPanelUnten.setBackground(Color.WHITE);
    System.out.println("Yellow");
  }

  public static void Red() {
    this.jPanelOben.setBackground(Color.RED);                   //red
    this.jPanelMitte.setBackground(Color.WHITE); 
    this.jPanelUnten.setBackground(Color.WHITE);
    System.out.println("Red");
  }

  public static void YellowRed() {
    this.jPanelOben.setBackground(Color.RED);                   //yellowRed
    this.jPanelMitte.setBackground(Color.YELLOW); 
    this.jPanelUnten.setBackground(Color.WHITE);
    System.out.println("YellowRed");
  }

    
  public void Toggle_ActionPerformed(ActionEvent evt) {
    // TODO hier Quelltext einfügen
    if (OnOff) {
      OnOff = false;
      this.Toggle.setBackground(Color.green);
      this.Toggle.setText("On"); 
    } else if (!OnOff) {
        OnOff = true;
        this.Toggle.setBackground(Color.RED);
        this.Toggle.setText("Off");  
      } // end of if-else

  } // end of Toggle_ActionPerformed
    
  public static void Ampelphase(boolean OnOff) {
while (OnOff) { 
  Green();
  try {
    Thread.sleep(2000);
  } catch(Exception e) {
    throw new RuntimeException(e);
  } 
  if (OnOff) {
    Yellow();
    if (OnOff) {
      Red();
      if (OnOff) {
        YellowRed();
      } else {
        break;
      } // end of if-else
    } else {
      break;
    } // end of if-else
  } else {
    break;
  } // end of if-else
} // end of while
  }
    
    
    
  public static void wait(int ms)
  {
    try
    {
      Thread.sleep(ms);
    }
    catch(InterruptedException ex)
    {
      Thread.currentThread().interrupt();
    }
  }
    
  public static void main(String[] args) {
    new AmpelAuto();

  }
    
    
        // Ende Methoden
} // end of class AmpelAuto`

提前致谢