请问如何在界面上设置按钮，并且定义按钮的位置以及做出响应？

Question

请问如何在界面上设置按钮，并且定义按钮的位置以及做出响应？  
我写了段程序，可是在屏幕上无法显示按钮，请各位DX帮忙看看！！  
 
 
import  java.awt.*;  
import  java.awt.event.*;  
import  java.applet.*;  
import  java.lang.*;  
 
 
public  class  Text_io  extends  Panel  implements  Runnable,ActionListener{  
                 int  t=0;  
               TextArea  input_box    =  new  TextArea("",  1,  60,  3);  
                                         
           public  void  paint(Graphics  g){  
                         
                                   setLayout  (new  GridLayout(1,1));  
                               GridBagConstraints  c  =  new  GridBagConstraints();  
                       c.insets  =    new  Insets(5,5,5,5);  
                                   Color  lsColor  =  new  Color(135,206,250);  
                       setBackground(lsColor);  
                       setSize(400,600);  
                           
                                                               
                         
                       c.gridx  =  20;  c.gridy  =  100;  c.gridwidth  =  3;  c.gridheight  =  1;  
                       c.weightx  =  0;  c.weighty  =  0.0;  c.anchor  =  GridBagConstraints.NORTH;  
                       c.fill  =  GridBagConstraints.NONE;  
                       Panel  p1=new  Panel();  
                       add(p1,c);  
                       p1.add(new  Button("yes"));  
                                   p1.addActionListener(this);  
           }              
             
 
             
             
           public  void  actionPerformed(ActionEvent  e){  
                       if(e.getActionCommand()=="yes"){  
                                       t=1;              
                       }  
                         
           }                
                                                             
                                                                                                                                                             
}  

Answer 1

把代码排好啊~~~
import java.awt.*;
import java.awt.event.*;class BasicButtons implements ActionListener
{
  private Frame win;
  private Label msg;
  private static final String hi="Hello!World!";
  private static final String huh="What,me worry?";
  private static final String bye="Exit";
  
  public BasicButtons()
  {
    win = new Frame("Event handling Example");
    init();
    win.show();
  }
  
  public void actionPerformed(ActionEvent e)
  {
    String cmd = e.getActionCommand();
    if(cmd.equals(hi))
      msg.setText(hi);
    else if(cmd.equals(huh))
      msg.setText(huh);
    else if(cmd.equals(bye))
      System.exit(0);
  }
  
  private void init()
  {
    win.setLayout(new FlowLayout());
    addButton(hi);
    addButton(huh);
    addButton(bye);
    msg = new Label("This is a label.");
    msg.setFont(new Font("Dialog",Font.BOLD,14));
    msg.setBackground(Color.green);
    msg.setAlignment(Label.CENTER);
    win.add(msg);
    win.setSize(600,100);
  }
  
  private void addButton(String name)
  {
    Button b = new Button(name);
    b.setFont(new Font("Helvetica",Font.BOLD,14));
    b.addActionListener(this);
    win.add(b);
  }
}
class BasicButtonsTest
{
  public static void main(String[] args)
  {
    BasicButtons bb = new BasicButtons();
  }
}

Answer 2

我建议还是自已算坐标算了，界面太难做了。
button.setBounds(new Rectangle (X,Y,buttonwidth,buttonheight));

Answer 3

有没有设置大小
setPreferredSize(new Dimension())???