[英]Trouble importing scanner class in Eclipse
import java.util.Scanner;
public class vendingMachine {
public static void main(String[] args) {
final int PENNIES_PER_DOLLAR = 100;
final int PENNIES_PER_QUARTER = 25;
Scanner in = new Scanner(System.in);
System.out.print("Please enter the bill ($ 1 is 1 $5 is 5, etc. : ");
int billValue = in.nextInt();
System.out.print("Please enter the price of the desired item in pennies. : ");
int itemPrice = in.nextInt();
// computation of change due
int changeDue = (billValue * PENNIES_PER_DOLLAR) - itemPrice ;
int dollarsBack = changeDue / PENNIES_PER_DOLLAR ;
changeDue = changeDue % PENNIES_PER_DOLLAR;
int quartersBack = changeDue / PENNIES_PER_DOLLAR;
// print statements
System.out.printf("Dollars due back %6d" , dollarsBack);
System.out.println();
System.out.printf("Quarters due back %6d" , quartersBack);
System.out.println();
}
}
我的錯誤消息是:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
The constructor Scanner(InputStream) is undefined
The method nextInt() is undefined for the type Scanner
The method nextInt() is undefined for the type Scanner
at vendingMachine.main(vendingMachine.java:8)
我是一名編碼新手,Eclipse是我使用的第一個IDE,所以如果您能幫助我解決這些錯誤,我將不勝感激。
絕對可以在項目中的某個地方使用Java文件名Scanner
。 嘗試
java.util.Scanner myScanner = new java.util.Scanner(System.in);
代替。 否則,編譯器將嘗試實例化您的類(也稱為Scanner)。
同樣,以大寫VendingMachine
類的名稱也是個好習慣,應該使用VendingMachine
而不是vendingMachine
。
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