error code help

[qzlvyh]

Hello everybody.
I have met a problem ,the following java code can't be compiled successfully in one of my computer but can be succeed in another one.Does anyone could tell me what is the problem?

I list the Code and Error message as below:
thank you in advance!

//////////////////////////////////////Code://///////////////////////////////////////////////

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Win extends JFrame implements ItemListener
{ JComboBox list; 
  JTextArea text;
  Win()
   { list=new JComboBox(); 
     text=new JTextArea();
     Button b=new Button();
     b.setBackground(Color.yellow);
     text.setForeground(new Color(12,250,34));
     list.setForeground(Color.blue);
      list.setBackground(Color.cyan);
     GraphicsEnvironment ge=
     GraphicsEnvironment.getLocalGraphicsEnvironment();
     String fontName[]=ge.getAvailableFontFamilyNames();
     for(int i=0;i<fontName.length;i++)
     { list.addItem(fontName[i]);
     }
     add(list,BorderLayout.NORTH);
     add(new JScrollPane(text),BorderLayout.CENTER);
     list.addItemListener(this);
     setVisible(true); 
     setBounds(100,120,300,300);
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
     validate();
   }
  public void itemStateChanged(ItemEvent e)
  {   String name=(String)list.getSelectedItem();
      Font f=new Font(name,Font.BOLD,32);
      text.setFont(f);
      text.setText("\n2008bj");
  }
}
public class Example8_18
{   public static void main(String args[])
    {  Win win=new Win();
    }
}

///////////////////////////////////Error Message:////////////////////////////////////////////

Example8_18.java:11: setBackground(java.awt.Color) in java.awt.Component cannot
be applied to (Color)
b.setBackground(Color.yellow);
^
Example8_18.java:12: enum types may not be instantiated
text.setForeground(new Color(12,250,34));
^
Example8_18.java:13: cannot find symbol
symbol : method setForeground(Color)
location: class javax.swing.JComboBox
list.setForeground(Color.blue);
^
Example8_18.java:14: cannot find symbol
symbol : variable cyan
location: class Color
list.setBackground(Color.cyan);
^
4 errors

[keang]

It would appear you have a Enum called Color on the classpath that the compiler is finding before it is finding java.awt.Color.

You could either:

1. Remove the Color Enum from the classpath (but only if it has nothing to do with this class).
2. Add an import statement to explicitly import java.awt.Color ie
   

   import java.awt.Color;

3. Use the fully specified name wherever you use Color ie
   

   list.setForeground(java.awt.Color.blue);