您可以使用JavaFX来实现一个可自定义节点数、路径长度和起止节点的最短路径可视化程序。以下是一个简单的实现示例:
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import java.util.ArrayList;
import java.util.List;
public class ShortestPathVisualization extends Application {
private static final int NODE_SIZE = 30;
private static final int PADDING = 50;
private int numNodes;
private int pathLength;
private int startNode;
private int endNode;
private List<Rectangle> nodes;
private List<Line> edges;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Create the main layout
BorderPane root = new BorderPane();
root.setPadding(new Insets(PADDING));
// Create the canvas for drawing the nodes and edges
Pane canvas = new Pane();
root.setCenter(canvas);
// Create the control panel
VBox controlPanel = new VBox(10);
controlPanel.setPadding(new Insets(10));
controlPanel.setBackground(new Background(new BackgroundFill(Color.LIGHTGRAY, CornerRadii.EMPTY, Insets.EMPTY)));
// Create the input fields and buttons
Button visualizeButton = new Button("Visualize");
visualizeButton.setOnAction(event -> visualizeShortestPath());
controlPanel.getChildren().addAll(visualizeButton);
root.setRight(controlPanel);
// Create the scene
Scene scene = new Scene(root, 800, 600);
primaryStage.setTitle("Shortest Path Visualization");
primaryStage.setScene(scene);
primaryStage.show();
}
private void visualizeShortestPath() {
// Clear previous nodes and edges
nodes.clear();
edges.clear();
// Generate random nodes
generateNodes();
// Generate random edges
generateEdges();
// Find the shortest path using an algorithm (e.g., Dijkstra's algorithm)
// Visualize the shortest path by coloring the nodes and edges
}
private void generateNodes() {
// Generate numNodes random nodes and add them to the canvas
nodes = new ArrayList<>();
for (int i = 0; i < numNodes; i++) {
Rectangle node = new Rectangle(NODE_SIZE, NODE_SIZE, Color.BLUE);
node.setTranslateX(Math.random() * (PADDING * 2));
node.setTranslateY(Math.random() * (PADDING * 2));
nodes.add(node);
}
}
private void generateEdges() {
// Generate random edges between nodes and add them to the canvas
edges = new ArrayList<>();
for (int i = 0; i < numNodes; i++) {
for (int j = i + 1; j < numNodes; j++) {
Line edge = new Line(nodes.get(i).getTranslateX() + NODE_SIZE / 2,
nodes.get(i).getTranslateY() + NODE_SIZE / 2,
nodes.get(j).getTranslateX() + NODE_SIZE / 2,
nodes.get(j).getTranslateY() + NODE_SIZE / 2);
edges.add(edge);
}
}
}
private void findShortestPath() {
// Implement an algorithm (e.g., Dijkstra's algorithm) to find the shortest path
}
}
这个示例程序使用JavaFX创建了一个可视化界面,并提供了一个按钮来触发最短路径的可视化。您可以根据您的需求修改和扩展代码,以满足您具体的要求。
请注意,这个示例程序只提供了一个基本的框架,您需要实现算法来找到最短路径,并根据算法的结果来可视化路径。您可以使用Dijkstra算法或其他适合的算法来实现最短路径的查找。
希望这个示例对您有帮助!