类型不匹配:无法在 while 循环中从 int 转换为 boolean [英] Type mismatch: cannot convert from int to boolean in while loop

问题描述

我刚开始学习java，试图找到答案，但我想我不够聪明.我正在尝试将从某个文件中获取的数组写入另一个文件.

I just started learning java, tried to find the answer but I guess I'm not smart enough. I'm trying to write an array which I got from some file into another file.

问题是当我试图让while"时，它表示无法从 int 转换为 boolean.任何人都可以提出一些建议.先感谢您.这就是我所拥有的:

The problem is when I'm trying to make "while" it's saying cannot convert from int to boolean. Can anyone suggest something. Thank you in advance. This is what I have :

public void savethefile() throws IOException{

File file1= new File("lala.ppm");
FileWriter save=new FileWriter(file1);
save.write(tytul);

while(i){
    save.write(arraycomment[i]);
    i++;
}

save.close();

推荐答案

大概 i 是一个 int，而不是 boolean.与 C/C++ 不同，这不会被隐式转换为 boolean.您必须将您的条件明确声明为 boolean.

Presumably i is an int, not a boolean. Unlike C/C++, this won't be converted to a boolean implicitly. You must explicitly state your condition as a boolean.

while (i < arraycomment.length) // or some other constant

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