check if number in java code example

Example 1: java check if string is number

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

Example 2: java check if int

//"% (modulo)" calulates the remainder when the value on the left is divided by the value on the right

float number = 20;

if(number%1 == 0){
	println("It is an integer");
} else {
	println("It is not an integer");
}