Java：不兼容的类型（int/boolean）
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Java: Incompatible Types (int/boolean)
提问by Adam Hussain
import java.io.*;
public class AdamHmwk4 {
public static void main(String [] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int counter1;
int counter2;
int counter3;
String answer = "";
System.out.println("Welcome to Adam's skip-counting program!");
System.out.println("Please input the number you would like to skip count by.");
counter1 = Integer.parseInt(br.readLine());
System.out.println("Please input the number you would like to start at.");
counter2 = Integer.parseInt(br.readLine());
System.out.println("Please input the number you would like to stop at.");
counter3 = Integer.parseInt(br.readLine());
System.out.println("This is skip counting by" + counter1 + ", starting at" + counter2 + "and ending at" + counter3 +":");
while (counter2 = counter3) {
counter2 = counter2 + counter1;
counter3 = counter2 + counter1;
}
}
}
I am trying to make skip-counting program. When I compile this code, the line while(counter2 = counter3){shows up as a Incompatible Types error. The compiler says it found an "int" but it requires a "boolean". Please keep in mind that I am a newbie, so I have not learned booleans in my Java class yet.
我正在尝试制作跳过计数程序。当我编译此代码时，该行while(counter2 = counter3){显示为 Incompatible Types 错误。编译器说它找到了一个“int”，但它需要一个“boolean”。请记住，我是一个新手，所以我还没有在我的 Java 课上学习布尔值。
回答by rgettman
You can't compare values with =, which is the assignment operator. Use ==to compare your values. Change
您不能将值与=，这是赋值运算符。使用==比较你的价值观。改变
while(counter2 = counter3){
to
到
while(counter2 == counter3){
Here's an introductory page for Java operators.
回答by Mik378
You use an assignment operator:
您使用赋值运算符：
while(counter2 = counter3)
instead of the equality operator:
而不是等号运算符：
while(counter2 == counter3)
回答by Juned Ahsan
Here is the problem:
这是问题所在：
while(counter2 = counter3)
=is used for assignment and post this statement, counter2 will be assigned the value of counter3. Hence your while loop will not behave the way you want. You need to use ==for comparing counter2 to counter 3
=用于赋值并发布此语句，counter2 将被分配 counter3 的值。因此，您的 while 循环不会按照您想要的方式运行。您需要==用于比较 counter2 和 counter 3
while(counter2 == counter3)
