scores.java

孤单惊魂

import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.game.*;

public class Scores
    extends GameCanvas implements CommandListener {
  private int[] hiScoress = new int[5];
  private static Displayable instance;
  synchronized public static Displayable getInstance() {
    if (instance == null) {
      instance = new Scores();
    }
    return instance;
  }

  private Scores() {
    super(true);
    addCommand(new Command("返回", Command.BACK, 1));
    setCommandListener(this);
    start();
  }

  public void start() {
    readHiScores();
    Graphics g = getGraphics();
    draw(g);
  }

  private void readHiScores() {
    RecordStore rs = null;
    try {
      rs = RecordStore.openRecordStore("HiScores", false);
    }
    catch (Exception e) {
    }
    if (rs != null) {
      try {
        int len;
        byte[] recordData = new byte[8];

        for (int i = 1; i <= rs.getNumRecords(); i++) {
          if (rs.getRecordSize(i) > recordData.length) {
            recordData = new byte[rs.getRecordSize(i)];
          }
          len = rs.getRecord(i, recordData, 0);
          hiScoress[i - 1] = (Integer.parseInt(new String(recordData, 0, len)));
        }
      }
      catch (Exception e) {
        System.err.println("Failed reading hi scores!");
      }
      try {
        rs.closeRecordStore();
      }
      catch (Exception e) {
        System.err.println("Failed closing hi score record store!");
      }
    }
    else {
      for (int i = 0; i < 5; i++) {
        hiScoress[i] = 0;
      }
    }
  }

  private void draw(Graphics g) {
    g.setColor(220, 220, 140);
    g.fillRect(0, 0, getWidth(), getHeight());
    g.setColor(250, 0, 12);
    g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_LARGE));
    g.drawString("玩家最高记录", getWidth() / 2, 30, Graphics.TOP | Graphics.HCENTER);
    for (int i = 0; i < 5; i++) {
      g.drawString("第" + Integer.toString(i + 1) + "名 :   " +
                   Integer.toString(hiScoress[i]), getWidth() / 2,
                   getHeight() / 2 - 30 + (i * 15),
                   Graphics.TOP | Graphics.HCENTER);
    }
  }

  public void commandAction(Command c, Displayable s) {
    Navigator.flow(c.getLabel());
  }
}