java JavaFX | FontWeight 类

JavaFX | FontWeight 类

原文:https://www.geeksforgeeks.org/javafx-fontweight-class/

FontWeight 类是 JavaFX 的一部分。FontWeight 类定义字体的粗细。字体权重类指定在系统上搜索字体时可以使用的不同字体权重。FontWeight 类继承了枚举类。

常用方法:

方法	说明
findByName（String n）	按名称返回 FontWeight。
findbywith(int w)	返回权重值最接近的字体权重。
getWeight()	返回视觉重量。
valueOf(字符串 n)	用指定的名称返回此类型的枚举常量。
值()	返回 FontWeight 类型的所有值。

以下程序说明了 FontWeight 类的使用:

Java program to create a TextFlow and add text object to it, set text Alignment and also set font weight of the font of the text and set line spacing of the text flow: In this program we will create a TilePane named tile_pane. Add Label named label and some buttons to the tile_pane. Set the Alignment of the tile_pane using the setAlignment() function. Set the Font weight of the font to EXTRA_BOLD. Add the tile_pane to the scene and add the scene to the stage and call the show() function to display the final results.

```java // Java program to create a TextFlow and // add text object to it, set text Alignment // and also set font weight of the font of text // and set line spacing of the text flow. import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.scene.layout.; import javafx.scene.paint.; import javafx.scene.text.; import javafx.geometry.; import javafx.scene.layout.; import javafx.scene.shape.;

public class FontWeight_1 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("FontWeight");

// create TextFlow             TextFlow text_flow = new TextFlow();

// create text             Text text_1 = new Text("GeeksforGeeks\n");

// set the text color             text_1.setFill(Color.GREEN);

// set font of the text             text_1.setFont(Font.font("Verdana", FontWeight.EXTRA_BOLD, 25));

// set text             text_flow.getChildren().add(text_1);

// set text Alignment             text_flow.setTextAlignment(TextAlignment.CENTER);

// set line spacing             text_flow.setLineSpacing(20.0f);

// create VBox             VBox vbox = new VBox(text_flow);

// set alignment of vbox             vbox.setAlignment(Pos.CENTER);

// create a scene             Scene scene = new Scene(vbox, 400, 300);

// set the scene             stage.setScene(scene);

stage.show();         }

catch (Exception e) {

System.out.println(e.getMessage());         }     }

// Main Method     public static void main(String args[])     {

// launch the application         launch(args);     } } ```

输出:
Java program to create a TextFlow and add text object to it, set text Alignment and also set font weight of the font of the text and also set a combo box to change font weight and set line spacing of the text flow: In this program we will create a TilePane named tile_pane. Add Label named label and some buttons to the tile_pane. Set the Alignment of the tile_pane using the setAlignment() function. Now set the FontWeight of the font to EXTRA_BOLD. Store all the names of FontWeight values in a String array. Now create a combobox which will contain the names of FontWeight values and also create an Action Event to handle the combobox events. The Event handler will set the font weight of the font to the chosen FontWeight value. Now create a VBox and add the tilepane and the combo box to vbox. Finally, add the vbox to the scene and add the scene to the stage and call the show() function to display the final results.

```java // Java program to create a TextFlow and // add text object to it, set text Alignment // and also set font weight of the font of text // and also set a combo box to change font weight // and set line spacing of the text flow. import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.scene.layout.; import javafx.scene.paint.; import javafx.scene.text.; import javafx.geometry.; import javafx.scene.layout.; import javafx.scene.shape.; import javafx.collections.*; import javafx.event.ActionEvent; import javafx.event.EventHandler;

public class FontWeight_2 extends Application {

// launch the application public void start(Stage stage) {

try {

// set title for the stage         stage.setTitle("FontWeight");

// create TextFlow         TextFlow text_flow = new TextFlow();

// create text         Text text_1 = new Text("GeeksforGeeks\n");

// set the text color         text_1.setFill(Color.GREEN);

// set font of the text         text_1.setFont(Font.font(Font.getFontNames().get(0),                                 FontWeight.EXTRA_BOLD, 50));

// font weight names         String weight[] = {"BLACK", "BOLD",                            "EXTRA_BOLD",                            "EXTRA_LIGHT",                            "LIGHT",                            "MEDIUM",                            "NORMAL",                            "SEMI_BOLD",                            "THIN" };

// Create a combo box         ComboBox combo_box =           new ComboBox(FXCollections.observableArrayList(weight));

// Create action event         EventHandler event = new EventHandler() {

public void handle(ActionEvent e)             {

// set font of the text                 text_1.setFont(Font.font(Font.getFontNames().get(0),                  FontWeight.valueOf((String)combo_box.getValue()), 50));             }         };

// Set on action         combo_box.setOnAction(event);

// set text         text_flow.getChildren().add(text_1);

// set text Alignment         text_flow.setTextAlignment(TextAlignment.CENTER);

// set line spacing         text_flow.setLineSpacing(20.0f);

// create VBox         VBox vbox = new VBox(combo_box, text_flow);

// set alignment of vbox         vbox.setAlignment(Pos.CENTER);

// create a scene         Scene scene = new Scene(vbox, 400, 300);

// set the scene         stage.setScene(scene);

stage.show();     }

catch (Exception e) {

System.out.println(e.getMessage());     } }

// Main Method public static void main(String args[]) {

// launch the application     launch(args); } } ```

输出: