各位大哥看一下吧？谢谢

Question

public void ShowNumber(){
repaint();
}
public void One(Graphics g){
int[] xPoint=new int[7];
int[] yPoint=new int[7];
int n;
n=7;
xPoint[0]=x+9*Width/200;             yPoint[0]=y+9*Width/200;
xPoint[1]=xPoint[0]+9*Width/140;     yPoint[1]=yPoint[0]-9*Width/140;
xPoint[5]=xPoint[1];                 yPoint[5]=yPoint[0]+9*Width/140;
xPoint[3]=xPoint[0]+27*Width/70;     yPoint[3]=yPoint[0];
xPoint[2]=xPoint[3]-9*Width/140;     yPoint[2]=yPoint[3]-9*Width/140;
xPoint[4]=xPoint[2];                 yPoint[4]=yPoint[3]+9*Width/140;
xPoint[6]=xPoint[0];                 yPoint[6]=yPoint[0];
g.drawPolygon(xPoint,yPoint,n);
g.fillPolygon(xPoint,yPoint,n);
}
帮忙说一下xPoint[1]=xPoint[0]+9*Width/140;     yPoint[1]=yPoint[0]-9*Width/140;
这是什么意思？
public void setBounds(int x,int y,int width,int height){
Width=height;
Length=width;
super.setBounds(x,y,width,height);
repaint();
}
public Dimension getMininumSize(){
return new Dimension(Length,Width);
}
public Dimension getPreferredSize()
{
return new Dimension(Length,Width);
}
private int Length=500;
private int Width=40;
private int x=Width/20;
private int y=Width/20;
private String str;
这段什么意思？
不好意思，谢谢