ArrayList转数组：

 

public class Test {            public static void main(String[] args) {                List
    
      list = new ArrayList
     
      ();                list.add("王利虎");                list.add("张三");                list.add("李四");                int size = list.size();                String[] array = (String[]) list.toArray(new String[size]);                for (int i = 0; i < array.length; i++) {                    System.out.println(array[i]);                }            }        }
     
    

数组转ArrayList：

 

 

public class Test {            public static void main(String[] args) {                String[] array = new String[3];                array[0] = "王利虎";                array[1] = "张三";                array[2] = "李四";                List
    
      list = Arrays.asList(array);                for (int i = 0; i < list.size(); i++) {                    System.out.println(list.get(i));                }            }        }