toArray、toArray[]方法

public static void main(String[] args) {

List list = new ArrayList<>();

list.add(1);

list.add(2);

Object[] objects1 = list.toArray();

Object[] objects2 = list.toArray();

System.out.println("objects1 == objects2 : "+(objects1 == objects2));

objects1[1]=4;

System.out.println("show objects1: "+ Arrays.toString(objects1));

System.out.println("show objects2: "+ Arrays.toString(objects2));

System.out.println("show list: "+list);

}

輸出結果：

objects1 == objects2 : false

show objects1: [1, 4]

show objects2: [1, 2]

show list: [1, 2]