Java Coding Problems , published by Packt

不錯的書，可以學Java 8到Java 12的語法，範例程式碼也不錯

https://github.com/PacktPublishing/Java-Coding-Problems

也有第二版是Java 12到Java 21的語法，還在努力看第一版，尚未入手第二版xd

https://github.com/PacktPublishing/Java-Coding-Problems-Second-Edition/

Files.mismatch() 比較檔案內容是否一樣

Java 12的新語法，可以比較檔案內容是否一樣

https://www.dariawan.com/tutorials/java/java-12-use-files-mismatch-compare-files/

運行結果

https://www.programiz.com/online-compiler/0iJzSpNkUPQ78

計算兩個日期有多少年？多少月?多少天？

https://www.programiz.com/online-compiler/8c2io3H9YgfER

import java.time.LocalDate;

import java.time.Period;

import java.time.temporal.ChronoUnit;

class Main {

   

   

    public static void main(String[] args) {

        LocalDate startLocalDate = LocalDate.of(1975, 5 , 23);

        LocalDate endLocalDate = LocalDate.now();

       

        Period peroidBetween = Period.between(startLocalDate , endLocalDate);

       

        System.out.println(peroidBetween.getYears()+" Years");

        System.out.println(peroidBetween.getMonths()+" Months");

        System.out.println(peroidBetween.getDays()+" Days");

       

        long totalDays = ChronoUnit.DAYS.between(startLocalDate , endLocalDate);

       

        System.out.println("totalDays:"+totalDays+" Days");

    }

}