Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.3k views
in Technique[技术] by (71.8m points)

java - Type mismatch: cannot convert from int to boolean in while loop

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.

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();
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

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

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...