秩序チェーンテーブル

public class Link {
    public long lData;
    public Link next;//reference to next Link

    public Link(long lData){
        this.lData=lData;
    }
    public void displayLink(){
        System.out.print("{"+lData+"}");
    }
}

public class SortedList {
    private Link first;

    public SortedList(){
        first =null;
    }

    public boolean isEmpty(){
        return (first==null);
    }

    public void insert(long key){
        Link newLink =new Link(key);
        Link previous=null;
        Link current =first;
        while(current!=null && key>current.lData){
            previous=current;
            current=current.next;
        }
        if(previous==null){
            first=newLink;
        }
        else{
            previous.next=newLink;
        }
        newLink.next=current;
    }

    public Link remove(){
        Link temp = first;
        first=first.next;
        return temp;
    }

    public void displayList(){
        Link current =first;
        while(current!=null){
            current.displayLink();
            current=current.next;
        }
    }
}

public class SortedListApp {
    /** * @param args */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        SortedList theSortedList = new SortedList();
        theSortedList.insert(20);
        theSortedList.insert(40);
        theSortedList.displayList();
        theSortedList.insert(10);
        theSortedList.insert(30);
        theSortedList.insert(50);
        theSortedList.displayList();
        theSortedList.remove();
        theSortedList.displayList();
    }
}