JavaFX场景入门(上)：https://developer.aliyun.com/article/1431707
查看电脑屏幕宽高
Screen primary = Screen.getPrimary(); double dpi = primary.getDpi(); System.out.println("当前屏幕dpi:"+dpi); Rectangle2D rec1 = primary.getBounds(); Rectangle2D rec2 = primary.getVisualBounds(); System.out.println("----全部屏幕--------"); System.out.println("左上角x:"+rec1.getMinX()+"左上角y"+rec1.getMinY()); System.out.println("右下角x--"+ rec1.getMaxX()+"右下角y--"+ rec1.getMaxY()); System.out.println("宽度："+rec1.getWidth()+"高度"+rec1.getHeight()); System.out.println("----可以看到的屏幕--------"); System.out.println("左上角x:"+rec2.getMinX()+"左上角y"+rec2.getMinY()); System.out.println("右下角x--"+ rec2.getMaxX()+"右下角y--"+ rec2.getMaxY()); System.out.println("宽度："+rec2.getWidth()+"高度"+rec2.getHeight());
给button设置图标
scene.setCursor(Cursor.HAND);//手，箭头啥的
Cursor CROSSHAIR 光标十字光标
Cursor . DEFAULT 光标默认值
Cursor DISAPPEAR 光标消失
Cursor CLOSED_HAND 光标闭合手
Contextmenudemo 上下文菜单演示
Cursor E _ RESIZE 光标E _ RESIZE
自定义图标
scene.setCursor(Cursor.cursor("img"));
从本地获取图片路径的方式
URL url = getClass().getClassLoader().getResource("icon/icon.png");
String oath = url.toExternalForm();
完整代码
@Override public void start(Stage primaryStage) throws Exception{ Button button = new Button("按钮"); button.setPrefHeight(100); button.setPrefWidth(300); URL url = getClass().getClassLoader().getResource("icon/icon.png"); String path = url.toExternalForm(); Group group = new Group(button); Scene scene = new Scene(group); scene.setCursor(Cursor.cursor(path)); primaryStage.setTitle("javafx"); primaryStage.setHeight(800); primaryStage.setWidth(800); primaryStage.setScene(scene); primaryStage.show(); } 打开网页，运行到代码就执行打开的操作 HostServices hostServices = getHostServices(); hostServices.showDocument("https://www.baidu.com/"); platform类的使用 Platform.runLater-队列线程按照顺序执行 Platform.runLater(new Runnable() { @Override public void run() { System.out.println("stop()"+Thread.currentThread().getName()); } }); ImplicitExit(false) 后台运行 Platform.setImplicitExit(false);// 设置这个之后呢不执行stop方法了 Platform.exit();//关闭
检测平台支支不支持什么效果
Platform.isSupported(ConditionalFeature.SCENE3D)//三d效果
public void start(Stage stage) throws Exception { stage.setTitle("SceneDemo"); HBox hbox =new HBox(); Button button =new Button("打开百度"); hbox.getChildren().add(button); button.setOnAction((e)->{ HostServices hostServices = getHostServices(); hostServices.showDocument("https://www.baidu.com/"); }); Scene scene =new Scene(hbox,400,500); scene.setCursor(Cursor.CLOSED_HAND);//手 stage.setScene(scene); stage.show(); }
Group容器
stage.setTitle("GroupDemo"); Group group =new Group(); Button button =new Button("按钮"); button.setLayoutX(50); button.setLayoutY(50); group.getChildren().add(button); //看位置是否有子节点 boolean is =group.contains(0, 0); System.out.println("位置是否有子节点:"+is); //将所有的子节点放置object[] Object[] o= group.getChildren().toArray(); System.out.println("多少个子节点:"+o.length); for (Object object : o) { System.out.println(object); } group.getChildren().addListener(new ListChangeListener<Node>() { @Override public void onChanged(Change<? extends Node> c) { //元素个数(当删除或增加时触发监听器) System.out.println("当前子控件数量："+c.getList().size()); } }); Scene scene =new Scene(group); scene.setCursor(Cursor.CLOSED_HAND);
JAVAFX项目
Main.java主项目
Application.css样式
Build.fxbuild用于程序的打包发布
Icons图标、Pane窗格、Platform平台、addEventFilter添加事件筛选器、getCharacter获取字符、PRESSED按下pressed、TYPE打字,
getCode获取代码,
案例：
import javafx.application.Application; import javafx.application.Platform; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import javafx.scene.input.KeyEvent; import javafx.scene.layout.BorderPane; import javafx.stage.Stage; import java.io.FileInputStream; public class javafx05stage extends Application { @Override public void start(Stage stage) throws Exception { stage.setTitle("整卷"); FileInputStream fileInputStream = new FileInputStream("F:\\IDEADemo\\hello\\Snipaste_2022-10-12_20-03-32.jpg"); Image image = new Image(fileInputStream); stage.getIcons().add(image); // HBox hbox = new HBox(); // Button button = new Button("确定"); // hbox.getChildren().add(button); stage.setWidth(600); stage.setHeight(500); BorderPane borderPane = new BorderPane(); FileInputStream fileInputStream1 = new FileInputStream("F:\\IDEADemo\\hello\\src\\Snipaste_2022-10-17_17-14-25.jpg"); Image image1 = new Image(fileInputStream1,200,200,true,true); ImageView imageView = new ImageView(image1); borderPane.getChildren().add(imageView); Scene scene = new Scene(borderPane,500,300); //舞台的风格必须带上场景 //stage.initStyle(StageStyle.UNDECORATED); stage.setScene(scene); //舞台事件 stage.setOnCloseRequest((e)->{ System.out.println("系统被关闭了"); }); //舞台键盘事件 //ADWS上下左右 stage.addEventFilter(KeyEvent.KEY_TYPED, e->{ if (e.getCharacter().equalsIgnoreCase("A")){ imageView.setTranslateX(imageView.getTranslateX()-10); } if (e.getCharacter().equalsIgnoreCase("D")){ imageView.setTranslateX(imageView.getTranslateX()+10); } if (e.getCharacter().equalsIgnoreCase("W")){ imageView.setTranslateY(imageView.getTranslateY()-10); } if (e.getCharacter().equalsIgnoreCase("S")){ imageView.setTranslateY(imageView.getTranslateY()+10); } }); //键盘按下: stage.addEventHandler(KeyEvent.KEY_PRESSED, e->{ //ESC按下ESC，退出程序 System.out.println(e.getCode().impl_getCode()); if (27 == e.getCode().impl_getCode()){ Platform.exit(); }; }); stage.show(); } public static void main(String[] args) { launch(); } }
Image
本地和网络图片
New Image(“file:c:/image/11.jpg”)
New Image(“https://img0.baidu.com/it/u=4119073184,4077902618&fm=253&fmt=auto&app=138&f=JPEG?w=442&h=267”)
File f =new File(“c:/image/11.jpg”);
String url =f.toURL().toString();
资源图片
与clas放在一起
Image image =new Image(“包名/11.jpg”);
案例
public class Imagedemo extends Application { Image[] images ={new Image("cat.jpeg"),new Image("cat1.jpeg"),new Image("cat2.jpeg")}; static int i = 0; ImageView imageView=new ImageView(images[i]); @Override public void start(Stage stage) throws Exception { stage.setTitle("imagedemo"); Button button =new Button("下一个"); BorderPane borderPane =new BorderPane(); button.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { i++; if (i>2) i=0; imageView.setImage(images[i]); } }); borderPane.setTop(button); borderPane.setCenter(imageView); Scene scene =new Scene(borderPane,1200,800); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(); } }
javafx场景
TextField文本字段、Cursor光标、imageView图像视图、addEventHandler添加事件处理程序、KeyEvent键盘事件、MouseEvent鼠标事件、
BorderPane布局
BorderPane布局顶部，底部，左，右或中心区域中的子节点。每个区域只能有一个节点。BorderPane的顶部和底部区域允许可调整大小的节点占用所有可用宽度。
左边界区域和右边界区域占据顶部和底部边界之间的可用垂直空间。
默认情况下，所有边界区域尊重子节点的首选宽度和高度。放置在顶部，底部，左侧，右侧和中心区域中的节点的默认对齐方式如下：
● 顶部: Pos.TOP_LEFT
● 底部: Pos.BOTTOM_LEFT
● 左侧: Pos.TOP_LEFT
● 右侧: Pos.TOP_RIGHT
● 中心: Pos.CENTER
案例：图片跟随鼠标移动
public class javafx06stage extends Application { @Override public void start(Stage stage) throws Exception { stage.setTitle("场景测试"); FileInputStream fileInputStream = new FileInputStream("F:\\IDEADemo\\hello\\src\\Snipaste_2022-10-17_17-14-25.jpg"); Image image = new Image(fileInputStream,200,200,true,true); ImageView imageView =new ImageView(image); imageView.setTranslateX(150); imageView.setTranslateY(100); //BorderPane布局 BorderPane borderPane =new BorderPane(); borderPane.getChildren().addAll(imageView); //HBox hbox = new HBox(); // VBox vbox = new VBox(10); // vbox.getChildren().addAll(new TextField(),new TextField(),new Button("确定")); //场景 Scene scene = new Scene(borderPane,600,400); //场景鼠标光标 scene.setCursor(Cursor.OPEN_HAND); stage.setScene(scene); //舞台事件 stage.addEventFilter(MouseEvent.MOUSE_MOVED, e->{ imageView.setTranslateX(e.getX()-100); imageView.setTranslateY(e.getY()-100); }); stage.show(); } public static void main(String[] args) { launch(); } }
