how do you creat a counter that counts down from 30 seconds when the game is started??
joemoma wrote ...
2012/3/12
counter
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Something similar was asked here . The "Counter" class would have a "long" variable called "startTime". Then in your constructor for Counter, do this:
Then in your act method:
where "doSomething" is a method that does whatever you want the counter to do when it reaches the 30 second mark. For example, if you want to stop the game at that mark, do:
I hope that that helps you out.
public void Counter()
{
startTime = System.currentTimeMillis();
}
public void act()
{
if (startTime != 0 && startTime <= System.currentTimeMillis() + 30000) //the 30000 part means 30 seconds
{
startTime = 0;
doSomething();
}
}
public void doSomething()
{
Greenfoot.stop();
}
Morran wrote...
public void act()
{
if (startTime != 0 && startTime <= System.currentTimeMillis() + 30000) //the 30000 part means 30 seconds
{
startTime = 0;
doSomething();
}
}
private boolean reached30secs = false;
public void act()
{
if (reached30secs = false && System.currentTimeMillis() - startTime >= 30000)
{
doSomething();
reached30secs = true;
}
}
@danpost I thought the same but it does exactly the same job, however the boolean version means you store 2 variables instead of one
im the same guy with the problem i was just on my friends account..it cant find variable "startTime" do i define what startTime is at the top?
Yes, you have to create the variable "startTime" somewhere in your code, preferably at the top or bottom of your class, but outside of any methods. If you don't know how to do it, it's very simple to do, just put this:
either at the top of the class or the bottom of the class.
private long startTime;
the game still wont do the counter. when i put the counter into the game it shows the little greenfoot but does not count.
Did you initialize "startTime" in the constructor of your Counter? Maybe that's the problem... You can also right click the Counter and then click inspect to see exactly what value "startTime" has at any point in the execution.
nope...that was problem haha.. thank you
I like this counter better than the basic "int--, if < 0, false "ones i've been making, since ( i think) it's not affected by the speed slider of greenfoot.
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