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                [TOC] # 介紹 Scanner類是**引用數據類型**的一種,我們可以使用該類來完成用戶鍵盤錄入,獲取到錄入的數據。 # 使用方法 Scanner使用步驟: 導包: ~~~ import java.util.Scanner; //java里面有個util這個文件夾下面就有這個類 ~~~ 創建對象實例: ~~~ Scanner sc = new Scanner(System.in); ~~~ 調用方法: ~~~ int i = sc.nextInt();用來接收控制臺錄入的數字 String s = sc.next();用來接收控制臺錄入的字符串 ~~~ ~~~ import java.util.Scanner; public class ScannerDemo { public static void main(String[] args) { //創建Scanner引用類型的變量 Scanner sc = new Scanner(System.in); //獲取數字 System.out.println("請輸入一個數字"); int n = sc.nextInt(); System.out.println("n的值為" + n); //獲取字符串 System.out.println("請輸入一個字符串"); String str = sc.next(); System.out.println("str的值為" + str); } } ~~~ **注意:如果是字符串5 加上 數字 1 結果是51,因為字符串拼接了**
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