setBackgroundcolor與參數

Question

我試圖創建一個MVC架構一個小的GUI程序，現在我希望能夠設置一個JTextField的背景，我的GUI從監聽器類：

package gui; 

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import java.util.Date; 

public class Gui extends JFrame { 

    private JTextField jtf; 
    private JLabel lblStatus; 


    public Gui() { 
     new JFrame(); 
     jtf = new JTextField(); 
     //jtf.addKeyListener(this); 
     lblStatus = new JLabel("Zeit:"); 

     setSize(700, 60); 
     setTitle("Tippmaster V1.0"); 
     setLocationRelativeTo(null); 
     setDefaultCloseOperation(EXIT_ON_CLOSE); 

     setLayout(new GridLayout(1, 2)); 
     add(jtf); 
     add(lblStatus); 
     setVisible(true); 

    } 
    public void addKeyListener(KeyListener kl){ 
     jtf.addKeyListener(kl); 

    public void setStatus(String status){ 
     lblStatus.setText(status); 
    } 

    /** 
    * 
    * @param color should involve the information of the color for example GREEN 
    */ 
    public void setBackgroundcolor(Color color){ 
     jtf.setBackground(Color.color); 
    } 

} 

所以我不能只在監聽器類寫：

package controller; 

import gui.Gui; 
import java.awt.*; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 

/** 
* Created by tq67 on 23.07.2014. 
*/ 
public class CharListener implements KeyListener { 

    private Gui gui; 

    public CharListener(Gui gui) { 
     this.gui = gui; 

    } 

    @Override 
    public void keyPressed(KeyEvent arg0) {  /* Nothing to do */  } 

    @Override 
    public void keyReleased(KeyEvent arg0) { 

      //Here I want to set the parameter sth like this or maybe only Green Blue etc.. 
      gui.setBackground(Color.GREEN);  
    } 

    @Override 
    public void keyTyped(KeyEvent e) {  /* Nothing to do */  } 
} 

那是可能的，或者我應該給一個字符串作爲參數，並在GUI類解析它？ Thx爲您提供幫助！

Answer 1

我發現這個問題由我自己：

因爲我發送彩色對象作爲參數，所以我只能寫：

public void setBackgroundcolor(Color color){ 
    jtf.setBackground(color); 
}