[英]Incompatible Types in Java. Hope for some assistance
I'm fairly new to Java
and I'm using BlueJ
. 我是Java
新手,我正在使用BlueJ
。 I keep getting the error: 我一直收到错误:
incompatible types
Now that sounds self explanatory, but I can't seem to figure out how to fix the problem. 现在这听起来很自我解释,但我似乎无法弄清楚如何解决问题。 Hope someone can help me. 希望可以有人帮帮我。 Thank you in advance. 先感谢您。
Here is the code to the class Program2
: 这是class Program2
的代码:
import java.util.*;
public class Program2 {
public static void main(String[] args) {
Scanner kbd = new Scanner(System.in);
Catalog store = new Catalog(3);
int itemnum;
Item item;
try {
store.insert
(new Music(1111, "Gold", 12.00, "Abba"));
store.insert
(new Movie(2222, "Mamma Mia", 16.00, "Meryl Streep"));
store.insert
(new Book(3333, "DaVinci Code", 8.00, "Dan Brown"));
store.insert
(new Music(4444, "Legend", 15.00, "Bob Marley"));
} catch (CatalogFull exc) {
System.out.println(exc);
}
// Insert code here to perform a sequence of
// interactive transactions with the user.
// The user enters an item number and the program
// either displays the item or prints an error message
// if the item is not found. The program terminates
// when the user enters zero as the item number.
while (!item.equals("0")) {
item = store.find(itemnum);
if (item != null) {
System.out.print(itemnum);
} else {
System.out.printf("%s was not found.%n", item);
}
System.out.println();
System.out.print("Player (0 to exit)? ");
itemnum = kbd.next(); //Error on "()"
}
}
}
String is not assignable to integer 字符串不能分配给整数
Use nextInt()
since itemnum
is int
, where as next()
returns String
, Thus incompatible types. 使用nextInt()
因为itemnum
是int
,其中next()
返回String
,因此不兼容的类型。
itemnum = kbd.nextInt();
not 不
itemnum = kbd.next();
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