java实现集合合并

public class StarEnds  {   
    LinkedList<StarEnd> qeuqeu = new LinkedList<StarEnd>();   
    public StarEnds add(StarEnd other) {   
        Iterator<StarEnd> it = qeuqeu.iterator();   
        while(it.hasNext()){   
            StarEnd temp = it.next();   
           if(StarEnd.isMix(temp, other)){   
                other.inputOther(temp);          
        it.remove();   
            }   
        }           qeuqeu.add(other);   
        return this;   
    }      
    public Iterator<StarEnd> iterator(){   
        return qeuqeu.iterator();   
    }   
        
  
    public static void main(String[] args) {   
        StarEnds ses = new StarEnds();   
        int[] arr = {1,2,4,5};   
        for(int i : arr){   
            StarEnd temp = new StarEnd();   
            temp.star=i;   
            temp.end =i+1;   
            ses.add(temp);   
        }   
        System.out.println(ses.qeuqeu);   
   }   
  

}   
 class StarEnd{   
    int star=0;    
    int end=0;   
    @Override  
    public String toString() {   
        return "{"+star+":"+end+"}";   
    }   
    public void inputOther(StarEnd other){   
            List<Integer> l = Arrays.asList(star,end,other.star,other.end);   
            star =  Collections.min(l);   
            end =   Collections.max(l);   
            other.star = 0;   
            other.end = 0;   
       
    }   
    public static boolean isMix(StarEnd one, StarEnd other) {   
        if(one==null||other==null){   
            return false;   
        }   
        return one.inStarEnd(other.star)||one.inStarEnd(other.end) ;   
    }   
    public boolean inStarEnd(int in){   
        return (in >= star && in<= end);   
    }   
}