class createCanvas
{
     
     int Xpos,Ypos,canvasWidth,canvasHeight;
     public Canvas canvasCreate(int Xpos,int Ypos,int canvasWidth,int canvasHeight)
     {
         Canvas canvas=new Canvas();
         canvas.setSize(canvasWidth, canvasHeight);
         canvas.setLocation(Xpos, Ypos);
         canvas.setBackground(Color.WHITE);
         return canvas;
     }
        
}
这是一个创建画布的类,为了清楚将画布设为了白色,但是似乎创建不了,看不见白色。高手赐教