1、每个javaFx程序定义在一个继承自javafx.application.Application的类中
Button：用于设置一个按钮，Button btOK = new Button("Button show name");
Scene：设置一个场景，设置那个Button的大小。Scene scene = new Scene(btok, 200, 250);
scene(Node, width, height);
Stage：用于设置在窗口中放什么东西的，就是包括Title之类firstStage.setTitle("The first program")
和放置那个场景,firstStage.setScene(scene)。最后输出firstStage.show();
继承了一个抽象类，需要Override它的start方法，start方法一般用于将UI组件放入一个场景，并且在舞台中显示该场景，
/* * 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. */ /** * * @author Liu */ import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.stage.Stage; public class MyJavaFx extends Application { @Override //Override the start method in the Application in class public void start(Stage firstStage) { Button buttonOK = new Button("stupid_one"); Scene scene = new Scene(buttonOK, 20, 250); firstStage.setTitle("The first program"); firstStage.setScene(scene); firstStage.show(); } // public static void main(String[] args) { // Application.launch(args); // } }
这样的话，那个按钮会充满着整个屏幕，不好。
那么用一个面板容器类
StackPane pane = new StackPane();
这样把那个Button放进去.就是pane.getChildren().add(btnOK);
然后把它放去场景那里就可以，
设置按钮监听也很简单。
注意的是需要设置成final，因为我这里1.7需要用而已，1.8不报错了。
https://www.zhihu.com/question/39397230
/* * 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 FxPackage; /** * * @author Liu */ import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.StackPane; import javafx.stage.Stage; public class MxJavaFx extends Application { @Override public void start(Stage primayStage) { StackPane pane = new StackPane(); pane.getChildren().add(new Button("liuweiming")); Scene scene = new Scene(pane, 300, 250); final Stage stage = new Stage(); stage.setTitle("liuweming"); stage.setScene(scene); Button btnOK = new Button("OK"); btnOK.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent t) { stage.show(); } }); pane = new StackPane(); pane.getChildren().add(btnOK); scene = new Scene(pane, 300, 250); primayStage.setTitle("hahah"); primayStage.setScene(scene); primayStage.show(); } public static void main(String[] arges) { launch(arges); } }
FlowPane使得每个Node之间更有层次，有规划，不然用pane添加两次Node（Button），会聚在一起，看不到
/* * 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 FxPackage; /** * * @author Liu */ import javafx.application.Application; import javafx.event.*; import javafx.scene.layout.*; import javafx.scene.control.*; import javafx.scene.*; import javafx.geometry.*; import javafx.stage.*; public class MxJavaFx extends Application { @Override public void start(Stage primayStage) { FlowPane pane = new FlowPane(); pane.setPadding(new Insets(11, 12, 13, 14)); //它的边框大小以像素作为单位是顶部11、右边12、底部13、左边14 pane.setHgap(5); //指定了面板中两个相邻节点之间的水平和垂直距离 pane.setVgap(5); pane.getChildren().addAll(new Label("first name"), new TextField()); pane.getChildren().addAll(new Label("TEL "), new TextField()); TextField tfMi = new TextField(); tfMi.setPrefColumnCount(1); //需要用到这些就需要现适声明 //设置期望列数是1 pane.getChildren().add(tfMi); Scene scene = new Scene(pane, 250, 250); primayStage.setTitle("ShowFlowPane"); primayStage.setScene(scene); primayStage.show(); } public static void main(String[] arges) { launch(arges); } }
但是上面那个排版有点乱，所以用
GridPane.我靠这些东西都有那么多个面板。一个比一个好，肯定用这个啊
pane.add(节点， col, row);
/* * 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 FxPackage; /** * * @author Liu */ import javafx.application.Application; import javafx.event.*; import javafx.scene.layout.*; import javafx.scene.control.*; import javafx.scene.*; import javafx.geometry.*; import javafx.stage.*; public class MxJavaFx extends Application { @Override public void start(Stage primayStage) { GridPane pane = new GridPane(); pane.setAlignment(Pos.CENTER); pane.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); pane.setHgap(5.5); pane.setVgap(5.5); pane.add(new Label("帐号"), 0, 0); pane.add(new TextField(), 1, 0); pane.add(new Label("密码"), 0, 1); pane.add(new TextField(), 1, 1); Button btn = new Button("click"); pane.add(btn, 1, 2); GridPane.setHalignment(btn, HPos.RIGHT); Scene scene = new Scene(pane, 300, 250); primayStage.setScene(scene); primayStage.setTitle("GridPane"); primayStage.show(); } public static void main(String[] arges) { launch(arges); } }
响应事件
/* * 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 DoNot; /** * * @author Liu */ import javafx.application.Application; import javafx.event.*; import javafx.scene.layout.*; import javafx.scene.control.*; import javafx.scene.*; import javafx.geometry.*; import javafx.stage.*; public class TestClass extends Application { @Override public void start(Stage primayStage) { GridPane pane = new GridPane(); pane.setAlignment(Pos.CENTER); pane.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); pane.setHgap(5.5); pane.setVgap(5.5); pane.add(new Label("帐号"), 0, 0); pane.add(new TextField(), 1, 0); pane.add(new Label("密码"), 0, 1); pane.add(new TextField(), 1, 1); Button btn = new Button("click"); ClickHandlerClass clickOne = new ClickHandlerClass(); btn.setOnAction(clickOne); pane.add(btn, 1, 2); GridPane.setHalignment(btn, HPos.RIGHT); Scene scene = new Scene(pane, 300, 250); primayStage.setScene(scene); primayStage.setTitle("GridPane"); primayStage.show(); } public static void main(String[] arges) { launch(arges); } } class ClickHandlerClass implements EventHandler<ActionEvent> { @Override public void handle(ActionEvent e) { GridPane t = new GridPane(); t.setAlignment(Pos.CENTER); t.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); t.setHgap(5.5); t.setVgap(5.5); t.add(new Label("欢迎点击"), 0, 0); Scene scene = new Scene(t, 250, 150); Stage stage = new Stage(); stage.setTitle("Click"); stage.setScene(scene); stage.show(); } }
用了一个Mybutton类来继承了button类，目的就是重写button里面的tostring方法，因为每个button的id都是不同，我需要点击这个button的时候能知道它是那个id，可以调用super("button name")来放名字
/* * 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 DoNot; /** * * @author Liu */ import javafx.application.Application; import javafx.event.*; import javafx.scene.layout.*; import javafx.scene.control.*; import javafx.scene.*; import javafx.geometry.*; import javafx.stage.*; public class TestClass extends Application { private int id; @Override public void start(Stage primayStage) { GridPane pane = new GridPane(); pane.setAlignment(Pos.CENTER); pane.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); pane.setHgap(5.5); pane.setVgap(5.5); // pane.add(new Label("帐号"), 0, 0); // pane.add(new TextField(), 1, 0); // pane.add(new Label("密码"), 0, 1); // pane.add(new TextField(), 1, 1); // MyButton btn = new MyButton(1); // btn.setText("click"); // btn.setOnAction(new ClickHandlerClass()); // btn.setOnAction(e -> { //// System.out.println(e.toString()); // GridPane t = new GridPane(); // t.setAlignment(Pos.CENTER); // t.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); // t.setHgap(5.5); // t.setVgap(5.5); // // t.add(new Label(e.toString()), 0, 0); // // Scene scene = new Scene(t, 250, 150); // Stage stage = new Stage(); // stage.setTitle("Click"); // stage.setScene(scene); // stage.show(); // }); // pane.add(btn, 1, 2); // GridPane.setHalignment(btn, HPos.RIGHT); MyButton[] arr = new MyButton[22]; for (int i = 1; i <= 20; ++i) { arr[i] = new MyButton(i, "number" + i); arr[i].setOnAction(e-> { System.out.println(e.toString()); }); } int to = 1; for (int i = 0; i < 4; ++i) { for (int j = 0; j < 5; ++j) { pane.add(arr[to++], j, i); } } Scene scene = new Scene(pane, 300, 250); primayStage.setScene(scene); primayStage.setTitle("GridPane"); primayStage.show(); } public static void main(String[] arges) { launch(arges); } private class ClickHandlerClass implements EventHandler<ActionEvent> { //内部类 int tf = id; @Override public void handle(ActionEvent e) { GridPane t = new GridPane(); t.setAlignment(Pos.CENTER); t.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); t.setHgap(5.5); t.setVgap(5.5); Label temp = new Label("欢迎点击" + tf); t.add(temp, 0, 0); Scene scene = new Scene(t, 250, 150); Stage stage = new Stage(); stage.setTitle("Click"); stage.setScene(scene); stage.show(); } } } class MyButton extends Button { int id; MyButton(int _id, String _name) { super(_name); id = _id; } // MyButton() { // // } @Override public String toString() { return id + ""; } }
javafx中launch只能被调用一次，所以自己写的一个MessageBox不能再次调用launch，直接调用start即可，但是start又不能是static的，所以不能写静态方法调用了。
/* * 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 DoNot; import javafx.application.Application; import static javafx.application.Application.launch; import javafx.scene.Scene; import javafx.scene.layout.StackPane; import javafx.scene.paint.Color; import javafx.scene.text.Font; import javafx.scene.text.Text; import javafx.stage.Stage; /** * * @author Liu */ public class MessageBox extends Application { private static String str; @Override public void start(Stage first) { StackPane stackPane = new StackPane(); Text text = new Text(str); text.setFont(Font.font("Verdana", 20)); text.setFill(Color.RED); stackPane.getChildren().add(text); Scene scene = new Scene(stackPane, Math.max(250, str.length() * 20), 100); first.setTitle("Show Messge"); first.setScene(scene); first.show(); } public MessageBox() {} public void show(String _str) { str = _str; start(new Stage()); //不能静态方法了 } }
一个面基计算器
/* * 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 DoNot; /** * * @author Liu */ import javafx.application.Application; import javafx.event.*; import javafx.scene.layout.*; import javafx.scene.control.*; import javafx.scene.*; import javafx.geometry.*; import javafx.stage.*; import javafx.scene.layout.HBox; import javafx.scene.text.Text; public class TestClass extends Application { @Override public void start(Stage primayStage) { GridPane pane = new GridPane(); pane.setAlignment(Pos.CENTER); pane.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); pane.setHgap(5.5); pane.setVgap(5.5); Label inputRadiusLabel = new Label("请输入半径:"); inputRadiusLabel.setOnMouseDragged(e -> { show("fff"); }); TextField inputRadiusTextField = new TextField("请输入一个实数"); pane.add(inputRadiusLabel, 0, 0); pane.add(inputRadiusTextField, 1, 0); Button clickButton = new Button("Click"); clickButton.setOnMouseDragged(e -> { clickButton.setText("aler"); }); clickButton.setOnAction(e-> { double radius = Double.parseDouble(inputRadiusTextField.getText()); double res = Math.acos(-1.0) * radius * radius; clickButton.setText("aler"); show("" + res); }); pane.add(clickButton, 1, 1); GridPane.setHalignment(clickButton, HPos.RIGHT); Scene scene = new Scene(pane, 300, 250); primayStage.setTitle("计算圆形面积"); primayStage.setScene(scene); primayStage.show(); } private void show(String str) { Pane pane = new Pane(); Text text = new Text(20, 20, str); text.setOnMouseDragged(e -> { text.setX(e.getX()); text.setY(e.getY()); }); pane.getChildren().add(text); Scene scene = new Scene(pane, 250, 50); Stage stage = new Stage(); stage.setTitle("message"); stage.setScene(scene); stage.show(); } public static void main(String[] arges) { launch(arges); } }
ImageView类。其中图片要放在生成的.class文件中。（清理并构建项目后，就会清除所有图片，注意）
然后输入包名 + image文件夹名 + 照片
也可以用http：//
/* * 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 DoNot; import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import javafx.scene.layout.StackPane; import javafx.stage.Stage; /** * * @author Liu */ public class PhotoViewer extends Application { @Override public void start(Stage first) { String str = "https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1792465142,3538385120&fm=23&gp=0.jpg"; StackPane stackPane = new StackPane(); ImageView imageView = new ImageView(new Image("DoNot/image/7.png")); // ImageView imageView = new ImageView(new Image(str)); stackPane.getChildren().add(imageView); Scene scene = new Scene(stackPane, 250, 250); first.setTitle("Photo Viewer"); first.setScene(scene); first.show(); } public static void main(String[] args) { launch(args); } }
使用java.util.Date()得到当前日期。
private final java.util.Date whenBuilt; whenBuilt = new java.util.Date();
------------------------------------------------------------------------------------------------------------------------------