求帮助，可否抽出一点时间描述这个方法里的每行都是做什么用的
private void fillData() {
  //创建一个集合(应该是这样吧？如果不对请具体描述下)
  List<String> items = new ArrayList<String>();
//创建Operator对象key,遍历ConditionUtil中的ipList集合（ List<Operator> ipList = new ArrayList<Operator>();）
  for (Operator key : ConditionUtil.ipList) {
//将key.getKey添加进 集合（最好能再具体点，我自己这么理解觉得太简单，希望有具体而容易理解的描述）
  items.add(key.getKey());
  }
//这句我有些疑问，强转成String数组是怎样一个过程呢？
  combo.setItems((String[]) items.toArray(new String[0]));
//这句也很迷惑，作用是什么？下拉列表放4个值这怎么才放一个？
  combo.select(0);
  stacklayout.topControl = singleComp;
// UiCondition uc（怎么描述？UiCondition 类中变量为空?）或this.uc.getCondition()这个指的什么呢?Condition具体类在下面) if (this.uc == null || this.uc.getCondition() == null)
  return;
  group.setText(this.uc.getUiname());
  if (this.uc.isUsed()) {
  for (Operator key : ConditionUtil.ipList) {
  if (this.uc.getCondition().getOperator().equals(key.getValue())) {
  combo.select(key.getOrder());
  if (key.getValue().equals("in")
  || key.getValue().equals("out")) {
  stacklayout.topControl = scopComp;
  stackcomp.layout();
//这行真没明白
  String str[] = this.uc.getUivalue().split(",");
  value1.setText(str[0]);
  value2.setText(str[1]);
  } else {
  stacklayout.topControl = singleComp;
  stackcomp.layout();
  value.setText(this.uc.getUivalue());
  }
  break;
  }
  }
  }

  }
public class Condition {
  private String value;

  private String name;

  private String operator;
}
public class ConditionUtil {

  public static List<Operator> charList = new ArrayList<Operator>();

  public static List<Operator> ipList = new ArrayList<Operator>();

  public static List<Operator> numbList = new ArrayList<Operator>();

  public static List<Operator> timeList = new ArrayList<Operator>();
}
ublic class UiCondition {
  private Condition condition;

  private String judge;

  private boolean used;

  private String uiname;

  private String uivalue;

  public static String CHAR = "char";

  public static String NUMB = "numb";

  public static String IP = "ip";

  public static String TIME = "time";
}
求指点了自己理解的有错误希望各位给指正让我少走些弯路

------解决方案--------------------

Java code

private void fillData() {
  //创建一个列表ArrayList,里面保存的是String对象
  List<String> items = new ArrayList<String>();
  //创建Operator对象key,遍历ConditionUtil中的ipList集合（ List<Operator> ipList = new ArrayList<Operator>();）
  for (Operator key : ConditionUtil.ipList) {
//ConditionUtil.ipList中的每一个元素Operator对象key的getKey()值添加到列表items里面
  items.add(key.getKey());
  }
//items.toArray(new String[0])这样就够了,toArray利用根据参数new String[0],创建String数据,(String[])这个强转是多余的,本来就是String[],不需要转换,也不能用强转转成别的数据
  combo.setItems((String[]) items.toArray(new String[0]));
//意思是combo选择第一个元素
  combo.select(0);
  stacklayout.topControl = singleComp;
// 代码不全还是怎么的,没看到getCondition()这方法
  if (this.uc == null || this.uc.getCondition() == null)
  return;
  //group是个JText吧,把Text设置成UIname的值
  group.setText(this.uc.getUiname());
  if (this.uc.isUsed()) {
  for (Operator key : ConditionUtil.ipList) {
  if (this.uc.getCondition().getOperator().equals(key.getValue())) {
  combo.select(key.getOrder());
  if (key.getValue().equals("in")
  || key.getValue().equals("out")) {
  stacklayout.topControl = scopComp;
  stackcomp.layout();
//就是把this.uc.getUivalue()的值,用","拆分成字符串数组.比如把"1,2,3,4,5" 拆成{"1","2","3","4","5"}
  String str[] = this.uc.getUivalue().split(",");
  value1.setText(str[0]);
  value2.setText(str[1]);
  } else {
  stacklayout.topControl = singleComp;
  stackcomp.layout();
  value.setText(this.uc.getUivalue());
  }
  break;
  }
  }
  }

  }
  //下面都是声明,没啥可说的
public class Condition {
  private String value;

  private String name;

  private String operator;
}
public class ConditionUtil {

  public static List<Operator> charList = new ArrayList<Operator>();

  public static List<Operator> ipList = new ArrayList<Operator>();

  public static List<Operator> numbList = new ArrayList<Operator>();

  public static List<Operator> timeList = new ArrayList<Operator>();
}
ublic class UiCondition {
  private Condition condition;

  private String judge;

  private boolean used;

  private String uiname;

  private String uivalue;

  public static String CHAR = "char";

  public static String NUMB = "numb";

  public static String IP = "ip";

  public static String TIME = "time";
}