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Roshan123
Roshan123 wrote ...

2020/7/9

random nu.

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Roshan123 Roshan123

2020/7/10

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thanks to both of you now its working
danpost danpost

2020/7/10

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SteveB wrote...
So, no key was pressed since the last call, and it returned null. You can't call toLowerCase() on null, thus you get the exception.
I threw the toLowerCase in hastily without regard to the fact that getKey returns null until a key is input. My apologies.
Roshan123 Roshan123

2020/7/12

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a little problem is their i want the random no. not to be repeated for example --- a,f,d,u,i,i
danpost danpost

2020/7/12

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Roshan123 wrote...
a little problem is their i want the random no. not to be repeated for example --- a,f,d,u,i,i
Use a List object instead of the Array object ; then you can remove objects from the list as they are used. You will also then need do something about when the list becomes empty.
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