劉任昌Java陣列array迴圈for-each loop方法length

w3schools學習Java

w3schools學習Java程式碼

//劉任昌2022/11/11陣列array宣告,型態後面加[]
public class Main {
  public static void main(String[] args) {
    String[] cars = {"富豪","寶馬","福特","罵自答","撈屎來食"};
    String[] classmates={"陳時中","獎萬安","黃珊珊","徐巧芯","雞排妹"};
    int j = cars.length;           /* 方法length得到陣列長度*/
    for (int i=0; i j; i++)        /* 迴圈列出我的汽車*/
       System.out.println(cars[i]);
    for (String i : cars)        /* for-each loop迴圈列出我的汽車*/
       System.out.println(i);
for (String i : classmates)  /* for-each loop迴圈列出*/
       System.out.println(i);
  }
}

Java語言資料型態

• 資料型態分成原始型primitive與非原始型nono-primitive二大類
• 原始型primitive
1. 布林boolean
2. 位元數byte
3. 短整數short
• 非原始型nono-primitive又稱為參照reference型態
1. 字串String
2. 陣列Array
3. 類別Class
4. 介面Interface