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I am learning java programming, and want to develop a small program code to help me with my other codes. I am looking to develop a program that will give me random numbers which i can assign to array which is of user-defined size. Would appreciate any help from the techies in here. :rolleyes:
If you want to take the input array size from the user, you need to use the JOptionPane().
After you get the array size, make a new array of that size. Then what you need to do is use a loop to fill the array with random numbers, which can be generated by the Math.random(). Remember: Math.random() gives value between 0 and 1. For your purpose, you can multiply the above number by some number and floor it by the Math.floor() method. Like if you want the range from 0 to 10, multiply the random number by 10. In case you still face any problems, please feel free to post it :thumbup1:
I do know how to use the JOPane() and will try that Math.random() and Math.floor(). I have one more question, how do i increase the lower level of the limit.? that is if the lower limit is 0 and i want it to be 5? Thanks a lot!
I am pretty new to Java. I was going through the post and I tried he Math.random() and Math.floor(), but i want to know what exactly does the Math.floor() method do..?? i mean i used it alright, but what does it do..???
InterNetWorKed Just add the number to the floored number like
WindowedCode:Math.floor(Math.random()*10)+5
Flooring means rounding up.. like when u get a random number, it will be between 0 and1, and when you multiply it with some number it can result in a decimal number, but what is required is an integer.So the Math.floor() is used. remember: Math.floor() rounds just removes the decimals.. that is if number is 2.1 it will be rounded to 2, also 2.9 will be rounded to 2 as it is being Floored.
In case of anything else please feel free to ask.