What are the common causes of ArrayStoreException in Java?

In Java programming, array is an important data structure. Arrays can store multiple values ​​in a single variable, and more importantly each value can be accessed using an index. But while working with arrays, some exceptions may occur, one of them is ArrayStoreException. This article will discuss common causes of ArrayStoreException exceptions.

1. Type mismatch

The element type must be specified when the array is created. ArrayStoreException is thrown when we try to store incompatible data types into an array. For example, in an array of integers, we are trying to store a floating point number.

int[] numbers = new int[3];
numbers[0] = 1;
numbers[1] = 2;
numbers[2] = 3.5; // 抛出ArrayStoreException异常

2. Array is full

Before trying to add elements to the array, we must ensure that the array has enough space to store the new element. ArrayStoreException is thrown when trying to add elements to an array that is already full.

int[] numbers = new int[3];
numbers[0] = 1;
numbers[1] = 2;
numbers[2] = 3;

numbers[3] = 4; // 抛出ArrayStoreException异常

3. Array type mismatch

When trying to add a new element to an array containing elements of different types, an ArrayStoreException exception will be thrown. For example, in an array that stores integers and strings, this exception is thrown when we try to add a floating point number.

Object[] arr = new Object[3];
arr[0] = "Hello";
arr[1] = 123;
arr[2] = 3.4;

arr[3] = 2; // 抛出ArrayStoreException异常

4. Multidimensional arrays

Multidimensional arrays may also cause ArrayStoreException exceptions, especially when we try to add elements of incompatible types in a given dimension. For example, this exception is thrown when we try to add a string to the second element of an array of integers.

int[][] arr = new int[2][2];
arr[0][0] = 1;
arr[0][1] = 2;
arr[1][0] = 3;

arr[1][1] = "Hello"; // 抛出ArrayStoreException异常

Summary

In Java programming, common causes of ArrayStoreException exceptions may be type mismatch, array is full, array type mismatch, and elements of incompatible types added to multi-dimensional arrays. For these problems, we need to pay attention to type matching and array size in the code. Only when we can understand these potential problems and fix or avoid them can our code be better implemented.

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