coloringalgorithm.java

主要功能：对五条道路的车辆进行控制

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package fivestarcross;

import java.util.ArrayList;

/**
 *
 * @author Dante
 */
public class ColoringAlgorithm {
    
    public ArrayList<Integer> onecolorset;
    public ArrayList<VexNode> thegraphcolorset;
    

    public ColoringAlgorithm (ArrayList<VexNode> thegraph){
        //默认构造函数
        thegraphcolorset   =  thegraph;
	}
    
    

    public void DrawColor(){
        //使用贪婪算法对交通图着色
		
       onecolorset    =   new ArrayList<Integer>();
       VexNode tnode;
       int count;
       boolean flag; 
       int  si=  thegraphcolorset.size();
       int color = 0;
       for(count=0;count<si;){
           onecolorset.clear();
           color++;
           for(int i=0;i<si;i++){
               tnode=thegraphcolorset.get(i);
               if(tnode.vexcolor==0){
                   flag=true;
                    ArrayList<Integer> first = tnode.firstarc ;
                   int fsize = first.size();
                   for(int j=0;j<fsize;j++)
                       if(onecolorset.contains(first.get(j))){
                           flag=false;
                           break;
                       }
                   if(flag){
                       tnode.vexcolor = color;
                       onecolorset.add(tnode.vexnum);
                       count++;
                   }
               }
                   
           }
       }
    }

}