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String, text, numbers, I/O I part<br />
int n=10; /*Number of seconds to wait*/<br />
/*initialize you input stream*/<br />
...<br />
/*Now start you while loop*/<br />
long lStart = (new Date()).getTime();<br />
long lCurrent = (new Date()).getTime();<br />
while((lCurrent-lStart < n*1000) && (Input.available()==0)){<br />
Thread.currentThread.sleep(100); /* This will give JVM time to other threads */<br />
lCurrent = (new Date()).getTime();<br />
}<br />
********************************************<br />
You could simply count number of steps inside the loop keeping in mind that each<br />
step takes 100ms but I think using dates would be a bit more precise method.<br />
Alex Shlega<br />
Q: I tried to write a program where I imported the java.math.* package...But sin()<br />
didn't work!<br />
It looked something like this.<br />
import java.math.*;<br />
public class ...{<br />
public Fnx (double x){<br />
double answer = sin(x) - 2;<br />
return answer;<br />
}<br />
...<br />
}<br />
But sin() didn't work! I had to write Math.sin(), at which point I could just comment the<br />
import statement out.<br />
What am I doing wrong?<br />
Answer: You're confusing what the import statement does, and what Math is.<br />
Math is a class in the package java.lang, just as System is.<br />
java.math is a package containing two classes: BigDecimal and BigInteger.<br />
When you call Math.sin, you're using a class method in the Math *class*, just as<br />
when you call System.out.println () you're using an instance variable called "out"<br />
which belongs to the System class.<br />
Your import statement merely means you can use BigDecimal and BigInteger without<br />
prefixing them with java.math. - ie "new java.math.BigInteger()" becomes just "new<br />
BigInteger".<br />
You can't get away from putting Math.sin in your class.<br />
--<br />
Jon Skeet - http://www.pobox.com/~skeet<br />
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