What is the use of one-dimensional array instead of two-dimensional array in java?

One-dimensional array instead of two-dimensional array

Because the random access performance of arrays is very good, many JDK class libraries, such as ArrayList, Vector, etc., use arrays as their arrays accomplish. However, as a software developer, you must also know that the access speeds of one-bit arrays and two-dimensional arrays are different. One-bit arrays are accessed faster than two-dimensional arrays. Therefore, if you want to use a two-dimensional array in a performance-sensitive system, you can try to use a reliable algorithm to convert the two-dimensional array into a one-dimensional array and then process it to improve the response speed of the system.

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