How to check if a given string is number in Java
To check whether a given string is number or not, we can use the string.chars().allMatch() method where it returns true if a string is number else it returns false.
Here is an example:
public class Main
{
public static void main(String[] args) {
String myString = "9291";
boolean isNumeric = myString.chars().allMatch( Character::isDigit );
if(isNumeric)
System.out.println(myString + " is a number");
else
System.out.println(myString + " is not a number");
}
}Output:
9291 is a numberFalse case
public class Main
{
public static void main(String[] args) {
String myString = "hello fashion";
boolean isNumeric = myString.chars().allMatch( Character::isDigit );
if(isNumeric)
System.out.println(myString + " is a number");
else
System.out.println(myString + " is not a number");
}
}Output:
hello fashion is not a number- Share:
