I came across this program and its not behaving in expected way.
public class StringTest
{
public static void main(String[] args)
{
String s = "Hello world";
for(int i = 0 ; i < s.length() ; i++)
{
System.out.write(s.charAt(i));
}
}
}
If we think it should print Hello world but it prints nothing. What is going on? Any ideas? Thanks in advance.
You want: System.out.print(s.charAt(i));
As per the API of write
:
Note that the byte is written as given; to write a character that will be translated according to the platform's default character encoding, use the print(char) or println(char) methods.
As noted in a comment to your question, if you really wish to use write()
you need to flush()
.
The reason why write(int)
doesn't print anything is because it only flushes the stream on \\n
and when autoFlush
is true.
public void write(int b) {
try {
synchronized (this) {
ensureOpen();
out.write(b);
if ((b == '\n') && autoFlush)
out.flush();
}
}
catch (InterruptedIOException x) {
Thread.currentThread().interrupt();
}
catch (IOException x) {
trouble = true;
}
}
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