multiplier.java

J2ME的游戏原代码!希望能帮助有需要帮助的师兄弟们！

/*
 * Multiplier.java
 *
 * Created on den 2 juli 2003, 17:04
 */


package DXBenchmarker;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import java.io.IOException;

/**
 *
 * @author  23046803
 * @version
 */
public class Multiplier extends Form implements CommandListener
{
  private static final Command exitCommand = new Command("Exit", Command.EXIT, 2);
  private static final Command okCommand = new Command("OK", Command.OK, 2);
  
  private static final int NUMBER_OF_LOOPS = 1000000;
  
  private long startTime;
  private long endTime;
  private long totalTime;
  
  private Display display;
  private Displayable previousDisplay;
  
  public Multiplier(Display display, Displayable previousDisplay)
  {
    super("Multiplier application");
    
    this.addCommand(exitCommand);
    this.addCommand(okCommand);
    this.setCommandListener(this);
    
    this.display = display;
    this.previousDisplay = previousDisplay;
    
    showStartForm();
  }
  
  public void commandAction(Command c, Displayable s)
  {
    if (c == exitCommand)
    {
      display.setCurrent(previousDisplay);
    }
    if (c == okCommand)
    {
      showPleaseWait();
      makeMultiplications();
    }
  }
  
  public void showStartForm()
  {
    this.append("This test will now run a set of multiplications, depending upon the platform the test may take as much as one minute!");
  }
  
  public synchronized void showPleaseWait()
  {
    while (this.size() > 0)
    {
      delete(0);
    }
    
    this.append("Please wait \n");
    this.append("Making calculations (this could take one minute)");
  }
  
  public synchronized void makeMultiplications()
  {
    int numberOfMultiplications = 0;
    int a = 1000;
    int b = 1;
    startTime = System.currentTimeMillis();
    
    for (int x = 0; x < NUMBER_OF_LOOPS; x = x + 1)
    {
      a = b * 0;
      a = b * 1;
      a = b * 2;
      a = b * 3;
      a = b * 4;
      a = b * 5;
      a = b * 6;
      a = b * 7;
      a = b * 8;
      a = b * 9;
    }
    
    endTime = System.currentTimeMillis();
    totalTime = endTime - startTime;
    
    numberOfMultiplications = 10 * NUMBER_OF_LOOPS;
    
    while (this.size() > 0)
    {
      delete(0);
    }
    
    this.append("Total time (ms): " + totalTime + "\n");
    this.append("Multiplications: " + numberOfMultiplications + "\n");
    this.append("Multiplications / millisecond: " + numberOfMultiplications / totalTime + "\n");
  }
}