吳泊諺Java預設方法length()與charAt()

留言

張貼留言

這個網誌中的熱門文章

吳泊諺Java輸入套件import package掃描器Scanner

圖片
import java.util.Scanner; /*開啟套件package util=utility用途,Scanner掃描器*/ /*吳泊諺utility industry=公用事業產業,電力,自來水,效用=utility */ class MyClass { public static void main(String[] args) { String a, b=""; Scanner myObj = new Scanner(System.in); //輸入到掃描Scanner物件 System.out.print("輸入: "); a = myObj.nextLine(); /*輸入文字nextLine到變數a */ System.out.println("長度: " + a.length()); for (int i = 0; i
閱讀完整內容

吳泊諺java陣列array長度

圖片
w3schools陣列arry宣告:型態[ ]方括號corner brackets //吳泊諺,2022/11/10,學習陣列,方法length public class Main { public static void main(String[] args) { String[] cars = {"富豪", "寶馬", "福特", "馬自達","勞斯萊斯"}; int j ; /*宣告位元數 j*/ j=cars.length; /*給定j=陣列cars.長度*/ System.out.println("陣列長度:"+ j);/*方法印出來print*/ for (int i = 0 ; i w3schools陣列arry宣告:型態[]方括號corner brackets
閱讀完整內容

吳泊諺Python字典Dictionaries

圖片
w3schools截圖 w3schools練習程式碼 #字典 keys:values, 吳泊諺 #w3schools原來 字串:字串,改成 整數:字串 a = { #市場價值最大的五家公司 2330: "台積電", 2317: "鴻海", 2454: "聯發科", 2412: "中華電", 6505: "台塑化" } print(a) print(a[6505]) print(a.get(2330))#功能同 a[2330] print(a.keys()) #keys()方法列出key搜尋鍵 print(a.values()) #keys()方法列出values值 b = a.copy() print("列出b " + str(b)) print(b[2317]) print(b.clear()) a.update({2308: "台達電"}) print(a.values()) print("用迴圈列出字典a的所有值") for t in a: print(a[t]) 字典方法Dictionary Methods Dictionary Methods Python has a set of built-in methods that you can use on dictionaries. Method Description clear() Removes all the elements from the dictionary copy() Returns a copy of the dictionary fromkeys() Returns a dictionary with the specified keys and value get() Returns the value of the specified key items() Returns a list containing a tuple for each key value pair keys() Returns a list containing the dictionary'...
閱讀完整內容