package java2d;import java.awt.*;import java.awt.event.*;import javax.swing.JPanel;import javax.swing.border.EtchedBorder;import javax.swing.border.TitledBorder;import java.awt.font.TextLayout;import java.awt.font.FontRenderContext;import java.awt.image.BufferedImage;import java.awt.geom.Rectangle2D;/** * Global Controls panel for changing graphic attributes of * the demo surface. */public class GlobalControls extends JPanel {    Surface surf;        public GlobalControls() {        setLayout(new GridBagLayout());        setBorder(new TitledBorder(new EtchedBorder(), "報警信息"));        add(surf = new Surface());           }	 public class Surface extends JPanel implements Runnable {        public float al1=(float)7.0;        public float al2=(float)9.5;        public Thread thread;        private BufferedImage bimg;       private Font font = new Font("serif", Font.BOLD, 18);               public Surface() {            //setBackground(Color.black);                    }            public Dimension getMinimumSize() {            return getPreferredSize();        }            public Dimension getMaximumSize() {            return getPreferredSize();        }            public Dimension getPreferredSize() {        return new Dimension(135,315);    }     public void drawLed(Graphics2D g,int type,int x,int y)   {      switch(type)      {        case 1:          g.setColor(new Color(0,255,0));          break;        case 2:          g.setColor(new Color(255,255,255));          break;        case 3:          g.setColor(new Color(251,251,19));          break;        case 4:          g.setColor(new Color(255,0,0));          break;        default:          g.setColor(new Color(0,255,0));      }     g.fillOval(x,y,20,20);      }	  public int alarm(float val,float al1,float al2){      int type=1;      if(val>=al1&&val<al2){          type=3; }      else          if(val>=al2){              type=4;          }      else          if(val<al1)          type=1;      else          type=2;      return type;  }            public void paint(Graphics g) {            if (bimg != null) {                g.drawImage(bimg, 0, 0, this);            }        }                public void start() {            thread = new Thread(this);            thread.setPriority(Thread.MIN_PRIORITY);            thread.setName("AlarmInformation");            thread.start();        }                public synchronized void stop() {            thread = null;                        notify();        }                    public void run() {                Thread me = Thread.currentThread();                while (thread == me && !isShowing() || getSize().width == 0) {                try {                    thread.sleep(500);                } catch (InterruptedException e) { return; }            }                Dimension d = getSize();            bimg = (BufferedImage) createImage(d.width, d.height);            Graphics2D big = bimg.createGraphics();            big.setFont(font);            FontMetrics fm = big.getFontMetrics();            int ascent = fm.getAscent();            int descent = fm.getDescent();                            while (thread == me && isShowing()) {                //big.setBackground(getBackground());				big.setBackground(Color.black);                big.clearRect(0, 0, d.width, d.height);				float[] H=new float[7];				float[] L=new float[7];                if(Java2Demo.datapool!=null){					H=Java2Demo.datapool.getdataF("high_frequency_table");					L=Java2Demo.datapool.getdataF("low_frequency_table");					}                                big.setColor(Color.black);                int ssH = 1;                                                                           drawLed(big,alarm(H[2],al1,al2),5,8);                     big.drawString("風機左X方向",30,25);										drawLed(big,alarm(H[0],al1,al2),5,38);                    big.drawString("風機左Y方向",30,55);										drawLed(big,alarm(H[4],al1,al2),5,68);					big.drawString("風機左Z方向",30, 85);					                     drawLed(big,alarm(H[3],al1,al2),5,98);					 big.drawString("風機右X方向",30,115);										 drawLed(big,alarm(H[1],al1,al2),5,128);					 big.drawString("風機右Y方向",30,145);										 drawLed(big,alarm(H[5],al1,al2),5,158);					 big.drawString("風機右Z方向", 30,175);										 drawLed(big,alarm(L[0],al1,al2),5,188);					 big.drawString("風機左溫度",30,205);					 					 drawLed(big,alarm(L[1],al1,al2),5,218);					 big.drawString("風機右溫度", 30, 235);					 					 drawLed(big,alarm(L[2],al1,al2),5,248);					 big.drawString("電機左溫度", 30, 265);					 					 drawLed(big,alarm(L[3],al1,al2),5,278);					 big.drawString("電機右溫度", 30, 295);								                repaint();                try {                    thread.sleep(500);                } catch (InterruptedException e) { break; }            }            thread = null;        }    } // End Surface	}