本类实现游戏菜单，游戏关于和游戏帮助的信息，能够自适应不同的手机

/*游戏中的一些常用的框架*/
import javax.microedition.lcdui.*;
import java.util.Vector;
class showContent
{
int w,h;//屏幕的长和宽
int cw;//字体的宽
int page,maxPage;//帮助信息中的页码/最大页码
int rn;//每行最大字数
int maxR;//每屏最多显示的行数
int cr;//字体行距
Vector about;
Vector help;
public showContent(int wid,int hei,int charw,int charR,String[] aboutText,String[] helpText)
{
  about=new Vector(0,1);
  help=new Vector(0,1);
  w=wid;h=hei;cw=charw;cr=charR;
  rn=w/cw;
  maxR=(h-20)/cr;
  page=0;
  for(int m=0;m<aboutText.length;m++)
  {
   int i=1+(aboutText[m].length()-1)/rn;
   for(int p=0;p<i;p++)
   {
    if(p<i-1)
    about.addElement((String)(aboutText[m].substring(p*rn,(p+1)*rn)));
    else
    about.addElement((String)(aboutText[m].substring(p*rn)));
   }
  }
  for(int m=0;m<helpText.length;m++)
  {
   int i=1+(helpText[m].length()-1)/rn;
   for(int p=0;p<i;p++)
   {
    if(p<i-1)
    help.addElement((String)(helpText[m].substring(p*rn,(p+1)*rn)));
    else
    help.addElement((String)(helpText[m].substring(p*rn)));
   }
  }
  maxPage=(help.size()-1)/maxR;
}
public void showAbout(Graphics g1,int x,int y)//显示关于
{
  g1.setColor(0);
  g1.fillRect(0,0,w,h);
  g1.setColor(0xffffff);
  for(int i=0;i<about.size();i++)
  {
   g1.drawString((String)(about.elementAt(i)),x,y+i*cr,0);
  }
}
/*显示暂停*/
  public void drawPause(Graphics g1)
  {
   g1.setColor(0);
   g1.fillRect(w/2-30,h/2-6,60,30);
   g1.setColor(0xffffff);
   g1.drawRect(w/2-30,h/2-6,60,30);
   g1.drawString("暂停中",w/2-20,h/2,0);
  }
public void showHelp(Graphics g1,int x,int y)//显示帮助
{
  g1.setColor(0);
  g1.fillRect(0,0,w,h);
  g1.setColor(0xffffff);  
  for(int i=0;i<maxR;i++)
  {
   if(page*maxR+i<help.size())
   g1.drawString((String)(help.elementAt(page*maxR+i)),x,y+i*cr,0);
  }
  g1.setColor(0xffff00);
  g1.drawString("按上下方向键翻页",20,h-20,0);
}
  public void drawMenu(Graphics g1,int x,int y,int row,int w,String[] arrayStr,int no)//显示菜单
  {
     g1.setColor(0xffff00);
     g1.fillRect(x,y,w,arrayStr.length*row);
     g1.setColor(0xffffff);
     g1.drawRect(x,y,w,arrayStr.length*row);
     for(int m=0;m<arrayStr.length;m++)
     {
      if(no==m)
      g1.setColor(0x0000ff);
      else
      g1.setColor(0);
      g1.drawString(arrayStr[m],x+5,y+5+m*row,0);
     }   
}   
}