Why there is no outputs !

Question

I've been recently learning about I/O in java. However I tried a code about "write()" method defined by "PrintStream" Class, here it's:

public class Program
{
public static void main(String[] args) {

int b;
b = 's';
System.out.write(b);
System.out.write('\n');
}
}
//outputs:
s

The problem occurs when I delete the last line(System.out.write('\n');), there is simply no outputs. Where did 's' go!

Answer 1

@ChaoticDawg Thanks, now it makes sense.

Answer 2

Because you are using the write() method. The write method doesn't flush the stream automatically unless/until there is a newline character found. You can call the flush method directly to get the output.

public class Program
{
public static void main(String[] args) {

int b;
b = 's';
System.out.write(b);
System.out.flush();
}
}

https://docs.oracle.com/javase/7/docs/api/java/io/PrintStream.html#write(int)
https://docs.oracle.com/javase/7/docs/api/java/io/PrintStream.html#flush()

You should really be using the print or println methods to output to the console though.

public class Program
{
public static void main(String[] args) {

int b;
b = 's';
System.out.println((char)b);
}
}