ArrayLIst LinkedList list.toArray() , list.addAll();

**

list.toArray() , list.addAll();

**

import java.util.ArrayList;
import java.util.Arrays;

/**
 *
 */

public class Main {
    public static class Node{
        private int num;
        private String val;
        public Node(int num, String val){
            this.num = num;
            this.val = val;
        }
    }



    public static void main(String[] args) {
       // LinkedList list = new LinkedList<>();
        ArrayList list = new ArrayList<>();
        list.add(new Node(5,"aa"));
        list.add(new Node(6,"aa"));
        list.add(new Node(7,"aa"));
        list.add(new Node(8,"aa"));
        list.add(new Node(9,"aa"));
        list.add(new Node(10,"aa"));
        list.add(new Node(11,"aa"));

        for(Node c:list){
            System.out.print(c.num + c.val +" ");
        }
        System.out.println();

        Node[] a = new Node[2];
        a[0] = new Node(10,"aa");
        a[1] = new Node(11,"aa");

        Node[] b = list.toArray(new Node[list.size()]);
        for(Node c : b){
            System.out.print(c.num + c.val +" ");
        }
        System.out.println();

        list.addAll(Arrays.asList(a));
        for(Node c : list){
            System.out.print(c.num + c.val +" ");
        }
        System.out.println();

    }
}

结果：