import java.awt.*;
import javax.swing.*;
public class MessagePanel
extends JPanel{ private String message
= "欢迎使用"; private int xCoordinate = 20;
private int yCoordinate = 20;
private boolean centered;
private int interval = 10;
public MessagePanel(){
}
public MessagePanel
(String message
){ this.message = message;
}
return message;
}
public void setMessage
(String message
){ this.message = message;
repaint();
}
public int getxCoordinate(){
return xCoordinate;
}
public void setXCoordinate(int x){
this.xCoordinate = x;
repaint();
}
public int getyCoordinate(){
return yCoordinate;
}
public void setyCoordinate(int y){
this.yCoordinate = y;
repaint();
}
public boolean isCentered(){
return centered;
}
public void setCentered(boolean centered){
this.centered = centered;
repaint();
}
public int getInterval(){
return interval;
}
public void setInterval(int interval){
this.interval = interval;
repaint();
}
protected void paintComponent
(Graphics g
){ super.paintComponent(g);
if(centered){
int stringWidth=fm.stringWidth(message);
int stringAscent = fm.getAscent();
xCoordinate = getWidth()/2-stringWidth/2;
yCoordinate = getHeight()/2+stringAscent/2;
}
g.drawString(message, xCoordinate, yCoordinate);
}
public void moveLeft(){
xCoordinate-=interval;
repaint();
}
public void moveRight(){
xCoordinate+=interval;
repaint();
}
public void moveUp(){
yCoordinate-=interval;
repaint();
}
public void moveDown(){
yCoordinate+=interval;
repaint();
}
}
}