这个程序为什么字体没变色?

Question

你的类中没有main，真不知道你是怎样运行的，：）
你的程序中将设置颜色的部分加上对象名,例如：label.setForeground(Color.red)就行了
我觉得在内嵌类中的setForeground前面不加对象名，好像默认到Frame的属性了

Answer 1

//<applet code=Applettest width=400 height=300>
//</applet>
import java.awt.event.*;
import java.applet.*;
import java.net.*;
import javax.swing.*;
import java.awt.event.MouseEvent;
import java.awt.*;public class Applettest extends JApplet
{
private JLabel label;
private Color cColor = Color.GREEN;
private JPanel panel = new JPanel(new FlowLayout());

public void paint(Graphics g) 
{
super.paint(g);
panel.setBackground(cColor);
//label.setForeground(cColor);
}   public void init()
   {
     label = new JLabel("Welcome to CSDN");
     label.setFont(new Font("Arial",Font.TRUETYPE_FONT,12));
    
     Container ContentPane = this.getContentPane();
     ContentPane.setLayout(new BorderLayout());    
    
     label.addMouseListener(new MouseListener(){
       public void mouseClicked(MouseEvent mouseEvent)
       {
      
       }
    public void mousePressed(MouseEvent mouseEvent)
    {
        cColor = Color.RED;
        repaint();        
    }
    public void mouseReleased(MouseEvent mouseEvent)
    {
        cColor = Color.GREEN;
        repaint();        
    }
    public void mouseEntered(MouseEvent mouseEvent)
    {
        cColor = Color.BLUE;
        repaint();        
    }
    public void mouseExited(MouseEvent mouseEvent)
    {
        cColor = Color.DARK_GRAY;
        repaint();        
    }
    });
    
    panel.add(label);
    ContentPane.add(panel,BorderLayout.CENTER);
   }
}

Answer 2

import java.awt.event.*;
import java.applet.*;
import java.net.*;
import javax.swing.JLabel;
import java.awt.event.MouseEvent;
import java.awt.*;public class aa extends Applet 
{
  public aa()
  {
  }
  JLabel label;
  public void init()
  {
     label= new JLabel("欢迎到CSDN来");
    label.addMouseListener(new MouseListener()
    {
      public void mouseClicked(MouseEvent mouseEvent)
      {
        URL url = null;
        try
        {
          url = new URL("http://127.0.0.1/main.asp");
        }
        catch (MalformedURLException ex)
        {
        }
        getAppletContext().showDocument(url, "_blank");
      }      public void mousePressed(MouseEvent mouseEvent)
      {
       label.setForeground(Color.blue);
       repaint();
       System.out.println("blue");
      }      public void mouseReleased(MouseEvent mouseEvent)
      {
       label.setForeground(Color.red);
       repaint();
       System.out.println("red");
      }      public void mouseEntered(MouseEvent mouseEvent)
      {
       label.setForeground(Color.green);
       repaint();
       System.out.println("green");
      }      public void mouseExited(MouseEvent mouseEvent)
      {
       label.setForeground(Color.black);
       repaint();
       System.out.println("black");
      }
    });
    label.setFont(new Font("Arial",Font.BOLD,50));
    this.add(label);
  }
}