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Copy pathAddNumbersDemo.java
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73 lines (55 loc) · 1.92 KB
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package sample_GUI;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class AddNumbersDemo extends Application {
private Label lblEnterN1 = new Label("Enter n1: ");
private Label lblEnterN2 = new Label("Enter n2: ");
private TextField txtNum1 = new TextField();
private TextField txtNum2 = new TextField();
private Button btnSum = new Button("+");
private Label lblSum = new Label("Sum: ");
private Label lblDisplaySum = new Label();
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage primaryStage){
GridPane myPane = new GridPane();
myPane.setHgap(10);
myPane.setVgap(10);
Scene scene = new Scene(myPane, 600, 300);
primaryStage.setScene(scene);
primaryStage.show();
primaryStage.setTitle("Add two numbers");
myPane.add(lblEnterN1, 0, 0);
myPane.add(txtNum1, 1, 0);
myPane.add(lblEnterN2, 0, 1);
myPane.add(txtNum2, 1, 1);
myPane.add(lblSum,0,2);
myPane.add(lblDisplaySum,1,2);
myPane.add(btnSum,2,2);
myPane.setAlignment(Pos.CENTER);
btnSum.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
if ((txtNum1.getText().length()==0) && (txtNum2.getText().length()==0))
lblDisplaySum.setText(""+ 0.0 );
else if (txtNum1.getText().length()==0)
lblDisplaySum.setText(""+ (0.0 + Double.parseDouble(txtNum2.getText())));
else if (txtNum2.getText().length()==0)
lblDisplaySum.setText(""+ (0.0 + Double.parseDouble(txtNum1.getText())));
else
lblDisplaySum.setText(""+ (Double.parseDouble(txtNum1.getText()) +
Double.parseDouble(txtNum2.getText())) );
}
});
}
}