w3schools
<!DOCTYPE html>
<html>
<body>
<p>Please input a number between
5 and 10:</p>
<input id="demo" type="text">
<button type="button"
onclick="myFunction()">Test Input</button>
<p id="p01"></p>
<script>
function myFunction() {
var message, x;
message =
document.getElementById("p01");
message.innerHTML = "";
x =
document.getElementById("demo").value;
try {
if(x == "") throw "empty";
if(isNaN(x)) throw "not a number";
x = Number(x);
if(x < 5) throw
"too low";
if(x > 10) throw "too
high";
}
catch(err) {
message.innerHTML =
"Input is " + err;
}
}
</script>
</body>
</html>
package application;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.layout.StackPane;
public class Tutorial extends Application {
public static void main(String args[]){
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
StackPane layout = new StackPane();
Scene scene = new Scene(layout, 200, 200);
TextField text = new TextField();
layout.getChildren().addAll(text);
primaryStage.setTitle("CodersLegacy");
primaryStage.setScene(scene);
primaryStage.show();
}
}