exvector.java

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package exframework;

/**
 * <p>Title: ExFramework</p>
 *
 * <p>Description: lizhenpeng</p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: LP&P</p>
 *
 * @author lipeng
 * @version 1.0
 */
import java.util.*;
public class ExVector implements AllAction
{
  public ExVector()
  {
  }
  public void allAction(MainForm form)
  {
    Vector vec = new Vector();
    for(int i=0;i<8;i++)
    {
      vec.addElement(new Bullet());
    }
    System.out.println("Vector capacity:" + vec.capacity());
    while(true)
    {
      for(int i=0;i<vec.size();i++)
      {
        Bullet bullet=(Bullet)(vec.elementAt(i));
        bullet.y+=5;
      }
      checkIsExtendScreen(vec);
      if(vec.size()==0)
      {
        break;
      }
    }
    System.out.println("stop");
  }
  public void checkIsExtendScreen(Vector vec)
  {
    for(int i=0;i<vec.size();i++)
    {
      Bullet bullet=(Bullet)(vec.elementAt(i));
      if(bullet.y>200)
      {
        vec.removeElementAt(i);
      }
    }
  }
}
class Bullet
{
  public Bullet()
  {
    x = 5;
    y = 0;
    index = 0;
  }
  public int x;
  public int y;
  public int index;
}