Java AbstractSequentialList用法及代碼示例

// Java code to illustrate AbstractSequentialList
import java.util.*;
public class GfG {
    public static void main(String[] args)
    {
        // Creating an instance of
        // the AbstractSequentialList
        AbstractSequentialList<Integer> absl
            = new LinkedList<>();
        // adding elements to absl
        absl.add(5);
        absl.add(6);
        absl.add(7);
        // Printing the list
        System.out.println(absl);
    }
}

// Java code to illustrate
// methods of AbstractSequentialList
import java.util.*;
import java.util.AbstractSequentialList;
public class AbstractSequentialListDemo {
    public static void main(String args[])
    {
        // Creating an empty AbstractSequentialList
        AbstractSequentialList<String>
            absqlist = new LinkedList<String>();
        // Using add() method to
          // add elements in the list
        absqlist.add("Geeks");
        absqlist.add("for");
        absqlist.add("Geeks");
        absqlist.add("10");
        absqlist.add("20");
        // Output the list
        System.out.println("AbstractSequentialList: "
                           + absqlist);
        // Remove the head using remove()
        absqlist.remove(3);
        // Print the final list
        System.out.println("Final List: "
                           + absqlist);
        // Fetching the specific 
          // element from the list
        // using get() method
        System.out.println("The element is: "
                           + absqlist.get(2));
    }
}

import java.util.AbstractSequentialList;
import java.util.List;
import java.util.ListIterator;
public class MyList extends AbstractSequentialList<Integer> {
    private int size;
    public MyList(int size) {
        this.size = size;
    }
    @Override
    public ListIterator<Integer> listIterator(int index) {
        return new ListIterator<Integer>() {
            private int currentIndex = index;
            @Override
            public boolean hasNext() {
                return currentIndex < size;
            }
            @Override
            public Integer next() {
                return currentIndex++;
            }
            @Override
            public boolean hasPrevious() {
                return currentIndex > 0;
            }
            @Override
            public Integer previous() {
                return currentIndex--;
            }
            @Override
            public int nextIndex() {
                return currentIndex + 1;
            }
            @Override
            public int previousIndex() {
                return currentIndex - 1;
            }
            @Override
            public void remove() {
                throw new UnsupportedOperationException();
            }
            @Override
            public void set(Integer integer) {
                throw new UnsupportedOperationException();
            }
            @Override
            public void add(Integer integer) {
                throw new UnsupportedOperationException();
            }
        };
    }
    @Override
    public int size() {
        return size;
    }
    public static void main(String[] args) {
        List<Integer> list = new MyList(5);
        for (int i : list) {
            System.out.println(i);
        }
    }
}