Check if a string is a number code example
Example 1: check if string contains numbers
str.matches(".*\\d.*");
Example 2: java check if string is number
try {
int n = Integer.parseInt(str);
} catch (NumberFormatException e) {
// str is not a number
}
Example 3: check if the given string is a number
//Add this to your code and call
static private boolean isMyNumber(String s){
try{
Integer.parseInt(s);
return true;
}catch (Exception e){
return false;
}
}
Example 4: isnumber java
// find value is number or not in java..
// if the value is number output is true
// if the value is not a number then output is false..
public class Test {
public static void main(String args[]) {
System.out.println(Character.isDigit('c')); // false
System.out.println(Character.isDigit('5')); // true
}
}
Example 5: check if string can be a number and then make a number
if(Number(myNumber) != NaN){
myNumber = Number(myNumber);
}