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

问题描述

我刚刚开始学习java，试图找到答案，但我想我不够聪明。
我正在尝试将一个数组从一些文件写入另一个文件。

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.

问题是当我试图制作while时它说不能从int转换为boolean。任何人都可以提出建议先感谢您。
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

据推测我是 int ，而不是 boolean 。与C / C ++不同，它不会隐式转换为 boolean 。您必须明确说明您的条件为布尔。

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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