JavaFX |字体重量类

FontWeight 类是 JavaFX 的一部分。 FontWeight 类定义字体的粗细。 FontWeight 类指定在系统上搜索字体时可以使用的不同字体粗细。 FontWeight 类继承Enum类。

常用方法：

Method	Explanation
findByName(String n)	Returns FontWeight by its name.
findByWeight(int w)	Returns the closest FontWeight for a weight value.
getWeight()	Return the visual weight.
valueOf(String n)	Returns the enum constant of this type with the specified name.
values()	returns all the values of the FontWeight type.

下面的程序说明了 FontWeight 类的使用：

Java程序创建一个 TextFlow 并向其添加文本对象，设置文本对齐，还设置文本字体的字体粗细和设置文本流的行距：在这个程序中，我们将创建一个名为 tile_pane 的TilePane 。将名为 label 的标签和一些按钮添加到tile_pane 。使用setAlignment()函数设置tile_pane的对齐方式。将字体的字体粗细设置为EXTRA_BOLD 。将tile_pane添加到场景中并将场景添加到舞台并调用show()函数以显示最终结果。

// 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程序创建一个 TextFlow 并向其中添加文本对象，设置文本对齐方式，还设置文本字体的字体粗细，还设置一个组合框来更改字体粗细和设置文本流的行距：在这个程序中，我们将创建一个名为 tile_pane 的TilePane 。将名为 label 的标签和一些按钮添加到tile_pane 。使用setAlignment()函数设置tile_pane的对齐方式。现在将字体的 FontWeight 设置为EXTRA_BOLD 。将所有 FontWeight 值的名称存储在 String 数组中。现在创建一个组合框，其中将包含 FontWeight 值的名称，并创建一个动作事件来处理组合框事件。事件处理程序会将字体的字体粗细设置为所选的 FontWeight 值。现在创建一个 VBox 并将tilepane和组合框添加到vbox 。最后，将vbox添加到场景中并将场景添加到舞台并调用show()函数显示最终结果。

// 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：

注意：以上程序可能无法在在线 IDE 中运行，请使用离线编译器。

参考： https://docs.oracle.com/javase/8/javafx/api/javafx/scene/text/FontWeight.html