java is digit
The java.lang.Character.isDigit(char ch) is an inbuilt method in java
which determines whether a specified character is a digit or not.
// two characters
char c1 = 'A', c2 = '4';
// Function to check if the character
// is digit or not
System.out.println(
c1 + " is a digit -> "
+ Character.isDigit(c1));
System.out.println(
c2 + " is a digit -> "
+ Character.isDigit(c2));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;
}Copyright © 2021 Codeinu
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