陳冠辰資料庫管理

 /*陳冠辰2022/10/24Java變數variable資料type型態*/

public class Main {

  public static void main(String[] args) {

    int i;                    /*註解java, JavaScript, CSS*/

    int myNum = 5;            //宣告整數integer(whole number)

    float myFloatNum = 5.99f; //宣告浮點數floating point number, 4 bytes=32 bits,4位元組

    char myLetter = '月';     //宣告字元character, 2 bytes=16 bits,2位元組

    boolean myBool = true;    //宣告布林boolean, 1 bit,1位元

    String myText = "陳冠辰";  //宣告字串String

    i = myLetter;             //整數i=字元'月'

    System.out.println(myLetter + "字碼unicode 10進位" + i);

    System.out.println(myNum);

    System.out.println(myFloatNum);

    System.out.println(myLetter);

    System.out.println(myBool);

    System.out.println(myText);

  }