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This article mainly introduces "how to write code to achieve odd and even statistics". In daily operation, I believe that many people have doubts about how to write code to achieve odd and even statistics. I have consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubt of "how to write code to achieve odd and even statistics"! Next, please follow the editor to study!

Odd and even statistics

Write a program, after the program runs, enter a number string according to the screen prompt, and count how many even numbers and technical numbers there are after input.

The essential achievement is to split each string, and then convert the numbers.

1. Define INumberService for digital processing service.

Public interface INumberService {public int [] stat ();}

2. Define the NumberServiceImpll subclass.

Public class NumberServiceImpl implements INumberService {@ Overridepublic int [] stat () {int stat [] = new int [] {0result.length 0}; / / the first is even, the second is odd String str = InputUtil.getString ("Please enter numeric information:"); String result [] = str.split (""); / / split for by each character (int x = 0; x < result.length) ) {if (Integer.parseInt (result [x])% 2 = = 0) {stat [0] +;} else {stat [1] +;}} return stat;}}

3. Set up factory class.

Public class Factory {private Factory () {} public static INumberService getInstance () {return new NumberServiceImpl ();}}

4. Define the main class calling program.

Public class IOCaseDemo {public static void main (String [] args) {System.out.println (Arrays.toString (Factory.getInstance (). Stat ();}}

Execution result:

Please enter digital information: 1902389023890

[7, 6]

At this point, the study on "how to write code to achieve parity statistics" is over. I hope to be able to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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