java how to check string is number
public static boolean isNumeric(String strNum) {
if (strNum == null) {
return false;
}
try {
double d = Double.parseDouble(strNum);
} catch (NumberFormatException nfe) {
return false;
}
return true;
}java digit in number
public static void recursion(int number) {
if(number > 0) {
recursion(number/10);
System.out.printf("%d ", (number%10));
}
}Copyright © 2021 Codeinu
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