[英]Set and get methods in java
public class Examples
{
private int numbers[]; //instance variable
public Examples()
{
numbers = new int[10];
for (int i = 0; i < numbers.length; i++)
{ //constructor number 1
numbers[i] = 42;
}
}
public Examples(int[] array)
{
numbers = new int[array.length];
for (int i = 0; i < array.length; i++)
{
numbers[i] = array[i]; //constructor number 2
}
}
}
因此,我必须编写一个set方法,该方法将为实例变量创建一个新数组,该实例数组的长度与传递给setNumbers的数组的长度相同,然后复制其参数的值。
到目前为止,我有
public void setNumbers (int numbers)
{
int[] setNumbers = int numbers;
}
我从那里得到错误,不确定为什么
我不知道您的setter方法签名应该是什么,但是正确的方法可能是以下方法之一:
public void setNumbers (int []numbers) {
this.numbers = numbers;
// or perhaps you need to copy the argument:
// this.numbers = Arrays.copyOf(numbers, numbers.length);
}
要不然:
public void setNumbers (int numbers) {
this.numbers = new int[numbers];
}
另外,我会这样写你的构造函数:
public Examples()
{
numbers = new int[10];
Arrays.fill(numbers, 42);
}
public Examples(int[] array)
{
numbers = Arrays.copyOf(array, array.length);
}
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