java - 数组实例变量与setter方法摄入无关吗？

Question

In the main method I make a new object of the DotComClass and set locationOfShips array to 14 numbers. Then send those values as an argument over to the setter method (setLocations) in the other class (see below). My question is why does it allow that pass over without issue, since I set the max number of elements of the locations instance variable is 5?

  import java.util.Arrays;

  public class Main {
    public static void main(String[] args) {
      DotComClass dotCom = new DotComClass();
      int[] locationOfShips = {6,7,8,9,1,2,3,4,4,4,4,5,5,5};        
      dotCom.setLocations(locationOfShips);       
    }
  }

  public class DotComClass {
   int [] locations = new int[5]; // is this not related to the locations in the setter?

   public void setLocations (int[] locations){
     this.locations= locations;
     System.out.println(Arrays.toString(locations));
     }
  }

Answer 1

locations 字段是对数组的引用。

这指向对 5 个整数的新数组的引用。

int [] locations = new int[5]; // is this not related to the locations in the setter?

这将引用重新指向不同的数组。

this.locations= locations;

新数组有自己的大小。它不受引用先前指向的数组大小的限制。