How to use Java Recursive method

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1. Recursion

(1) Recursive introduction:

From a programming point of view, recursion refers to the phenomenon of invoking the method itself in the method definition, transforming a complex problem layer by layer into a smaller problem similar to the original problem to solve. The recursive strategy requires only a small number of programs to describe the repeated calculations needed in the problem-solving process.

(2) the basic use of recursion:

(3) points for attention of recursion:

Recursion must have an exit, otherwise memory overflow; although recursion has an exit, but the number of recursion should not be too much, otherwise memory overflow.

2. Recursive factorial

Case requirements: use recursion to find the factorial of 5, and output the results in the console.

Code implementation:

3. Recursively traverse the directory

Case requirements: given a path (E:\\ itcast), iterate through all the contents of that directory recursively, and output the absolute paths of all files to the console.

Code implementation:

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