graphnode.java

输入一个正则表达式

 package reg402;

import java.awt.Point;

public class GraphNode {
  private int ID;     //结点的代号
  private static int id = 0;
  private Point position;    //结点在视图中的位置

  public GraphNode() {
      //初始化给图中结点分配状态号
    ID = this.id++;
    position = null;
  }
  public GraphNode(Point position) {
    this();
    //设置结点的起始位置
    this.position = position;
  }
  public static void resetID() {
    //确定结点的代号
    id = 0;
  }
  public void setPosition(Point position) {
    //确定结点在视图中的位置
    this.position = position;
  }
  public int getID() {
      //取得状态号
    return this.ID;
  }
  public Point getPosition() {
      //取得结点位置
    return this.position;
  }
}