JavaFX 使用实例

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附上官方例子：http://docs.oracle.com/javase/8/javafx/sample-apps/
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */package login;import javafx.application.Application;import javafx.event.ActionEvent;import javafx.event.EventHandler;import javafx.geometry.Insets;import javafx.geometry.Pos;import javafx.scene.Scene;import javafx.scene.control.Button;import javafx.scene.control.Label;import javafx.scene.control.PasswordField;import javafx.scene.control.TextField;import javafx.scene.layout.GridPane;import javafx.scene.layout.HBox;import javafx.scene.paint.Color;import javafx.scene.text.Font;import javafx.scene.text.FontWeight;import javafx.scene.text.Text;import javafx.stage.Stage;import javax.swing.JOptionPane;/** * * @author Administrator */public class Login extends Application {    @Override    public void start(Stage primaryStage) throws Exception {        String title = "javafx welcome to login! h=" + String.valueOf((int) primaryStage.getHeight()) + ",w=" + String.valueOf((int) primaryStage.getWidth());        System.out.println(title);        System.out.println(primaryStage.getWidth());        if (Double.isNaN(primaryStage.getHeight())) {            System.out.println("is nan");        } else {            System.out.println("not is nan");        }        //primaryStage.setWidth(500);        // primaryStage.setHeight(500);        primaryStage.setTitle(title);        GridPane gridPane = new GridPane();        gridPane.setAlignment(Pos.CENTER);        gridPane.setHgap(10);        gridPane.setVgap(10);        gridPane.setPadding(new Insets(25, 25, 25, 25));        Scene scene = new Scene(gridPane, 300, 300);        primaryStage.setScene(scene);        Text sceneTitle = new Text("Welcome");        sceneTitle.setFont(Font.font("Tahoma", FontWeight.NORMAL, 20));        gridPane.add(sceneTitle, 0, 0, 2, 1);        Label userName = new Label("User Name:");        gridPane.add(userName, 0, 1);      final  TextField userTextField = new TextField();        gridPane.add(userTextField, 1, 1);        Label pw = new Label("Password:");        gridPane.add(pw, 0, 2);      final  PasswordField pwdBox = new PasswordField();        gridPane.add(pwdBox, 1, 2);        Button btn = new Button("Sign in");        HBox hbBtn = new HBox(10);        hbBtn.setAlignment(Pos.BOTTOM_RIGHT);        hbBtn.getChildren().add(btn);        gridPane.add(hbBtn, 1, 4);        final Text actiontarget = new Text();        gridPane.add(actiontarget, 1, 6);        btn.setOnAction(new EventHandler<ActionEvent>() {            @Override            public void handle(ActionEvent e) {                actiontarget.setFill(Color.FIREBRICK);                actiontarget.setText("Sign in button pressed");                String userString=userTextField.getText();                String passwordString=pwdBox.getText();                                if(userString!=null && userString.equals("admin")&&passwordString!=null&&passwordString.equals("123456"))                {                    JOptionPane.showMessageDialog(null, "登陆成功！");                }else{                     JOptionPane.showMessageDialog(null, "登陆失败，账号密码不正确！");                }            }        });        primaryStage.show();    }    /**     * @param args the command line arguments     */    public static void main(String[] args) {        launch(args);    }}
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