求助，如何用JAVA从一个界面跳到另一个界面

菜鸟一枚。。。求助各位大神。。。
第一个界面的程序：
  package shiyan;
  import javax.swing.SwingUtilities;
  import java.awt.BorderLayout;
  import javax.swing.JPanel;
  import javax.swing.JFrame;
  import java.awt.GridBagLayout;
  import javax.swing.JButton;
  import java.awt.Rectangle;
  public class Dasi extends JFrame implements jiemian{
  private static final long serialVersionUID = 1L;
  private JPanel jPanel = null;
  private JButton jButton = null;
  /**
    * This method initializes jPanel
   *
    * @return javax.swing.JPanel
   */
  private JPanel getJPanel() {
    if (jPanel == null) {
     jPanel = new JPanel();
     jPanel.setLayout(null);
     jPanel.add(getJButton(), null);
    }
    return jPanel;
  }
  /**
    * This method initializes jButton
   *
    * @return javax.swing.JButton
   */
  private JButton getJButton() {
    if (jButton == null) {
     jButton = new JButton();
     jButton.setBounds(new Rectangle(58, 26, 164, 46));
     jButton.setText("按钮");
     jButton.addActionListener(new java.awt.event.ActionListener()
     {
      public void actionPerformed(java.awt.event.ActionEvent e)
     {

       Jiemian jiemian=new Jiemian();
       //System.out.println("actionPerformed()"); // TODO Auto-generated Event stub actionPerformed()
      }
     });



    }
    return jButton;
  }
  /**
    * @param args
    */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    SwingUtilities.invokeLater(new Runnable() {
     public void run() {
      Dasi thisClass = new Dasi();
      thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      thisClass.setVisible(true);
     }
    });
  }
  /**
    * This is the default constructor
    */
  public Dasi() {
    super();
    initialize();
  }
  /**
    * This method initializes this
    *
   * @return void
    */
  private void initialize() {
    this.setSize(300, 200);
    this.setContentPane(getJPanel());
    this.setTitle("JFrame");
  }
  }

第二个界面的程序：


package shiyan;
  import javax.swing.SwingUtilities;
  import java.awt.BorderLayout;
  import javax.swing.JPanel;
  import javax.swing.JFrame;
  import java.awt.GridBagLayout;
  public class Jiemian extends JFrame {
  private static final long serialVersionUID = 1L;
  private JPanel jPanel1 = null;
  /**
    * This method initializes jPanel1
   *
    * @return javax.swing.JPanel
   */
  private JPanel getJPanel1() {
    if (jPanel1 == null) {
     jPanel1 = new JPanel();
     jPanel1.setLayout(null);
    }
    return jPanel1;
  }
  /**
    * @param args
    */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    SwingUtilities.invokeLater(new Runnable() {
     public void run() {
      Jiemian thisClass = new Jiemian();
      thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      thisClass.setVisible(true);
     }
    });
  }
  /**
    * This is the default constructor
    */
  public Jiemian() {
    super();
    initialize();
  }
  /**
    * This method initializes this
    *
   * @return void
    */
  private void initialize() {
    this.setSize(300, 200);
    this.setContentPane(getJPanel1());
    this.setTitle("你好");
  }
  }

我是分成两个类，然后在第一个界面中的按钮那块监听事件里也加了 “Jiemian jiemian=new Jiemian();”

可是实现不了，求助各位大神！！怎么才能实现从“按钮”那个界面跳到“你好”那个界面，谢谢！！而且在“Jiemian jiemian=new Jiemian();”后面加了jiemian.open()、jiemian.go()都不顶用
--------------------编程问答-------------------- public class Dasi extends JFrame implements jiemian红色部分去掉
  private void initialize() {
  this.setSize(300, 200);
  this.setContentPane(getJPanel1());
  this.setTitle("你好");
this.setVisible();//红色部分加上
  }   --------------------编程问答-------------------- this.setVisible(true); --------------------编程问答-------------------- 把别的Frame new出来之后，记得setVisible(true)啊
如：

Jiemian jiemian = new Jiemian();
jiemian.setVisible(true);
--------------------编程问答-------------------- 很简单的。新建另外一个类的对象，并实现方法生成窗体，并设置生成的窗体可见，然后在自己本窗体设置不可见：this.setVisible(false);许多登陆框是这样做的

补充：Java ,  Eclipse