16.4
public class Exercise16_4 extends Application{
public void start(Stage args){
GridPane pane = new GridPane();
pane.setPadding(new Insets(11,12,13,14));
Label label1 = new Label("Mile:");
Label label2 = new Label("Kilometer:");
TextField textfield = new TextField();
textfield.setAlignment(Pos.BOTTOM_RIGHT);
TextField textfield2 = new TextField();
textfield2.setAlignment(Pos.BOTTOM_RIGHT);
pane.add(label1, 0, 0);
pane.add(label2, 0, 1);
textfield.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent arg0) {
// TODO Auto-generated method stub
double mile = Double.parseDouble(textfield.getText());
double kilometer = mile * 1.602307322544464;
textfield2.setText("" + kilometer);
}});
textfield2.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent arg0) {
// TODO Auto-generated method stub
double kilometer = Double.parseDouble(textfield2.getText());
double mile = kilometer / 1.602307322544464;
textfield.setText("" + mile);
}});
pane.add(textfield, 1, 0);
pane.add(textfield2, 1, 1);
Scene scene = new Scene(pane, 250, 80);
args.setTitle("Exercise16_4");
args.setScene(scene);
args.show();
}
public static void main(String[] args){
Application.launch(args);
}
}