How to check whether the entered input is string or integer or float in java ?

Answer 1

you can use this code

int no=0;
try
{
no=Integer.parseInt(string);
if(string.contains("."))
{
if(string.contains("f"))
{
System.out.println("float");
}
else
System.out.println("double");
}
}

catch(Exception ex)
{
Console.WriteLine("not numeric or string");
}

Answer 2

You can check if the entered text is a number using regular exceptions.

Or you simply try to convert it to number and it is a number of conversion was OK:

try {
int number = Integer.parseInt(input);
// number
} catch (NumberFormatException e) {
// not a number
}