JavaFX Line

本文概述

• 如何创建线？
• 物产

通常, “直线”可以定义为在X-Y坐标平面中连接两个点（X1, Y1）和（X2, Y2）的几何结构。 JavaFX允许开发人员在JavaFX应用程序的GUI上创建代码行。 JavaFX库提供Line类, 它是javafx.scene.shape包的一部分。

如何创建线？

请按照以下说明创建线。

• 实例化类javafx.scene.shape.Line。
• 设置类对象的必需属性。
• 将类对象添加到组中

物产

线类包含以下描述的各种属性。

范例1：

package application;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.Group;
import javafx.scene.shape.Line;
import javafx.stage.Stage;
public class LineDrawingExamples extends Application{

	@Override
	public void start(Stage primaryStage) throws Exception {
		// TODO Auto-generated method stub
		Line line = new Line(); //instantiating Line class 
		line.setStartX(0); //setting starting X point of Line
		line.setStartY(0); //setting starting Y point of Line 
		line.setEndX(100); //setting ending X point of Line 
		line.setEndY(200); //setting ending Y point of Line 
		Group root = new Group(); //Creating a Group
		root.getChildren().add(line); //adding the class object //to the group
		Scene scene = new Scene(root, 300, 300);
		primaryStage.setScene(scene);
		primaryStage.setTitle("Line Example");
		primaryStage.show();
		
	}
	public static void main(String[] args) {
		launch(args);
	}

}

输出：

示例2：创建多行

package application;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;
import javafx.stage.Stage;
public class LineDrawingExamples extends Application{
	public static void main(String[] args) {
		launch(args);
	}
	@Override
	public void start(Stage primaryStage) throws Exception {
		// TODO Auto-generated method stub
		primaryStage.setTitle("Line Drawing Examples");
		Line line1 = new Line(10, 50, 150, 50); //Line(startX, startY, endX, endY)	
		Line line2 = new Line(10, 100, 150, 100);
		Line line3 = new Line(10, 50, 10, 100);
		Line line4 = new Line(150, 50, 150, 100);
		Group root = new Group();
		root.getChildren().addAll(line1, line2, line3, line4);
		Scene scene = new Scene (root, 300, 200, Color.GREEN);
		primaryStage.setScene(scene);
		primaryStage.show();
	}

}

输出：