用Java初始化数组的一部分

您可以这样做,它将根据提供的内容创建具有新大小的数组。

    String[] temp = new String[] {"water", "shovel", "berries", "stick", "stone", "seed", "axe"};
    String[] val = Arrays.copyOf(temp, 20);

    System.out.println(val.length);
    System.out.println(Arrays.toString(val));

20
[water, shovel, berries, stick, stone, seed, axe, null, null, null, null, null, null, null, null, null, null, null, null, null]

docs 这种声明数组的方法:

String[] array = {"Apple", "Orange"};

String[] array = new String[2];
array[0] = "Apple";
array[1] = "Orange";

array .(给出的实际警告是: Cannot define dimension expressions when an array initializer is provided

这是不可能的,但我们可以 null

String[] arr = new String[] {"water", "shovel", "berries", "stick", null, null};

String anArray = new String[] {"water", "shovel", "berries", "stick", "stone", "seed", "axe"};

创建大小为7的数组

String anArray = new String[20];

anArray[0] = "water";
anArray[1] = "shovel";
...