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tags: Java
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# 我也不知道要放哪裡的連結

[Java 抽象類別](https://ithelp.ithome.com.tw/articles/10184934)

[int to Integer Java](https://javahungry.blogspot.com/2021/11/int-to-integer.html)

[int to string java](https://www.educative.io/answers/how-to-convert-an-integer-to-a-string-in-java)

[string to int java](https://www.freecodecamp.org/news/java-string-to-int-how-to-convert-a-string-to-an-integer/)

[char to ascii java](https://stackoverflow.com/questions/16458564/convert-character-to-ascii-numeric-value-in-java)

[ascii to char java](https://linuxhint.com/convert-ascii-code-to-char-in-java/)