Analysis of Java array out of bounds

Array initialization in Java is actually the same as OC, which is divided into dynamic initialization and static initialization,

Dynamic initialization: specify the length and the initialization value will be given by the system

Static initialization: the initialization value is given, and the length is given by the system

When we use arrays, the most common problem is array out of bounds. Well, here is a simple example

This is a two-dimensional array. Obviously, the array is out of bounds. The following information will be printed on the console:

Very accurate positioning to line 31.

Let's take a look at a complete code example:

The compiler displays an array out of bounds error.

It is found that there is an error in the underlined part of the statement

The following modifications should be made:

The reason for the error is that when the company constructor does not initialize array e, the size of array e is still 0, and an array out of bounds error occurs.

The test program written in the above error mode is as follows:

The output is 0. That is, the array size is zero.

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