The following is my code and I found there is a grey line at the top and on the left of the applet.
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.util.*;
import java.text.*;
import java.net.*;
import java.io.*;
import java.lang.*;
public class Draw extends Applet implements MouseListener
{
private Panel ScrPanel;
public void init()
{
ScrPanel = new Panel();
ScrPanel.setBounds(new Rectangle(0,0,400,400));
ScrPanel.setBackground(Color.red);
this.setLayout(null);
this.add(ScrPanel);
ScrPanel.addMouseListener(this);
}
public void mouseClicked(MouseEvent e)
{
}
public void mousePressed(MouseEvent e)
{
ScrPanel.setBackground(Color.white);
}
public void mouseReleased(MouseEvent e)
{
ScrPanel.setBackground(Color.black);
System.out.println("hello"
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{
}
public void paint(Graphics g)
{
}
}
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.util.*;
import java.text.*;
import java.net.*;
import java.io.*;
import java.lang.*;
public class Draw extends Applet implements MouseListener
{
private Panel ScrPanel;
public void init()
{
ScrPanel = new Panel();
ScrPanel.setBounds(new Rectangle(0,0,400,400));
ScrPanel.setBackground(Color.red);
this.setLayout(null);
this.add(ScrPanel);
ScrPanel.addMouseListener(this);
}
public void mouseClicked(MouseEvent e)
{
}
public void mousePressed(MouseEvent e)
{
ScrPanel.setBackground(Color.white);
}
public void mouseReleased(MouseEvent e)
{
ScrPanel.setBackground(Color.black);
System.out.println("hello"
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{
}
public void paint(Graphics g)
{
}
}