how to check if a string 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 test if strings are equal

//This expression is true if str1 and str2 are equal, and false if they're not
str1.equals(str2)

//example use case:
String location = "London";
String destination = "London";
if (location.equals(destination)) {
	System.out.println("You have arrived!");
}