Question

我一直收到这个错误：

类型不匹配：无法从java.lang.String转换为int

每当我去编译我的程序。我只是把我的主要包括在内，因为我不认为这与课程有任何关系。有人可以帮忙。

import java.util.Scanner;     

public class publicationMain {
    public static void main(String[] args) {
        System.out
                .println("Hi, welcome to the Publication Program. You will be required to     answer several questions about the ");
        System.out.print("publication(s):");
        System.out.println("How many publications would you like?");
        Scanner keyboard = new Scanner(System.in);
        int x = keyboard.nextInt();
        int test1;
        test1 = "b"; // this is where I'm having my problem!
        int i;
        int b, d, e, f;
        double c;
        publicationAbstract[] a = new publicationAbstract[x];
        for (i = 0; i < a.length; i++) {
            System.out.println("What is the the title of the publication?");
            b = keyboard.nextInt();
            System.out.println("What is price of the publication?");
            c = keyboard.nextDouble();
            System.out
                    .println("What is the publication year for this publication?");
            d = keyboard.nextInt();
            System.out.println("Is this publication a Book(b) or a CD(c)?");
            e = keyboard.nextInt();

            if (test1 == e) {
                System.out.println("How many pages is the book?");
                f = keyboard.nextInt();
                a[i] = new publicationSub1(b, c, d, e, f);
                a[i].trans(c);
                a[i].getpublicationinfo();
                a[i].useMethod();
            } else {
                System.out.println("How many minutes are there in the book?");
                f = keyboard.nextInt();
                a[i] = new publicationSub2(b, c, d, e, f);
                a[i].trans(c);
                a[i].getpublicationinfo();
                a[i].useMethod();
            }

        }
    }
}

Answer 1

当你说，

int test1;
test1="b";

你说test1是整数原始类型，然后你尝试为它分配一个String。这显然是非法的。如果你想要的话，我不清楚

int test1 = (int) 'b';

或

String test1 = "b";

甚至

int test1 = Integer.parseInt("b", 16); // <-- from hex.

Answer 2

test1是int，但您将其设置为等于字符串。 “b”不是整数。

我一直收到错误，我知道这可能是一个简单的错误，但我不能为了我而弄清楚

2 个答案: