java中数组是对象吗？

是的。java中的数组是对象。在Java编程语言中，数组是动态创建的对象，可以赋值给Object类型的变量。Object类的所有方法都可以在数组上调用。

原文链接： https://www.geeksforgeeks.org/array-primitive-type-object-java/

An array in Java is an object. Now the question how is this possible? What is the reason behind that? In Java, we can create arrays by using new operator and we know that every object is created using new operator. Hence we can say that array is also an object. Now the question also arises, every time we create an object for a class then what is the class of array?

• In Java, there is a class for every array type, so there’s a class for int[] and similarly for float, double etc.
• The direct superclass of an array type is Object. Every array type implements the interfaces Cloneable and java.io.Serializable.
• In the Java programming language, arrays are objects (§4.3.1), are dynamically created, and may be assigned to variables of type Object (§4.3.2). All methods of class Object may be invoked on an array.

For every array type corresponding classes are available and these classes are the part of java language and not available to the programmer level. To know the class of any array, we can go with the following approach:

// Java program to display class of 
// int array type
public  class Test {

 public static void  main(String[] args) {
      int [] x = new int[3];
      System.out.println(x.getClass().getName());
  }
}

Output:

[I 

“[”表示这是一个数组，而且是一维的，“I”表示数组元素是int类型的。
NOTE:[I this is the class for this array, one [ (square bracket) because it is one dimensional and I for integer data type.
Here is the table specifying the corresponding class name for some array types:-

int[]                     [I
int[][]                   [[I
double[]                  [D
double[][]                [[D
short[]                   [S
byte[]                    [B
boolean[]                 [Z

In Java programming language, arrays are objects which are dynamically created, and may be assigned to variables of type Object. All methods of class Object may be invoked on an array.

// Java program to check the class of 
// int array type
public class Test {
    public static void main(String[] args)
    {
        // Object is the parent class of all classes 
        // of Java. Here args is the object of String
        // class.
        System.out.println(args instanceof Object);
  
        int[] arr = new int[2];
  
        // Here arr is also an object of int class.
        System.out.println(arr instanceof Object);
    }
}

Output:

true
true

Reference : https://docs.oracle.com/javase/specs/jls/se7/html/jls-10.html

This article is contributed by Bishal Kumar Dubey. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course.