有限自动机的状态转换图显示程序的实现,用户任意给定有限自动机M(状态转换矩阵及初态、终态信息),在屏幕上显示输出M的状态转换图。程序应具有通用性,状态节点在屏幕上的分布应合理、美观,最终以GUI界面展示使用Java编程
时间: 2023-07-14 19:14:02 浏览: 182
有限状态自动机(NFA)的确定化
4星 · 用户满意度95%
以下是一个简单的Java代码实现,可以根据用户输入的有限自动机状态转换矩阵及初态、终态信息,在GUI界面上显示出状态转换图。其中使用了JavaFX库来实现GUI界面展示。
```java
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.stage.Stage;
import java.util.ArrayList;
public class FiniteAutomaton extends Application {
private int[][] matrix; // 状态转换矩阵
private boolean[] isStart; // 初态信息
private boolean[] isEnd; // 终态信息
private ArrayList<StateNode> nodes = new ArrayList<>(); // 存储状态节点
private ArrayList<Transition> transitions = new ArrayList<>(); // 存储状态转换
@Override
public void start(Stage primaryStage) throws Exception {
// 用户输入有限自动机信息,略
// 生成状态节点
for (int i = 0; i < matrix.length; i++) {
nodes.add(new StateNode(i, isStart[i], isEnd[i]));
}
// 生成状态转换
for (int i = 0; i < matrix.length; i++) {
for (int j = 0; j < matrix[i].length; j++) {
if (matrix[i][j] != -1) {
transitions.add(new Transition(nodes.get(i), nodes.get(j), matrix[i][j]));
}
}
}
// 显示状态转换图
primaryStage.setTitle("Finite Automaton");
Pane pane = new Pane();
for (StateNode node : nodes) {
Circle circle = new Circle(30, Color.WHITE);
if (node.isStart()) {
circle.setStroke(Color.GREEN);
}
if (node.isEnd()) {
circle.setStroke(Color.RED);
}
Label label = new Label(Integer.toString(node.getId()));
StackPane stackPane = new StackPane(circle, label);
stackPane.setLayoutX(50 * node.getId());
stackPane.setLayoutY(50);
pane.getChildren().add(stackPane);
}
for (Transition transition : transitions) {
Line line = new Line(50 * transition.getFrom().getId() + 30, 50, 50 * transition.getTo().getId() + 30, 50);
Label label = new Label(Character.toString((char) transition.getInput()));
StackPane stackPane = new StackPane(line, label);
pane.getChildren().add(stackPane);
}
primaryStage.setScene(new Scene(pane, 50 * nodes.size(), 100));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
private static class StateNode {
private int id;
private boolean isStart;
private boolean isEnd;
public StateNode(int id, boolean isStart, boolean isEnd) {
this.id = id;
this.isStart = isStart;
this.isEnd = isEnd;
}
public int getId() {
return id;
}
public boolean isStart() {
return isStart;
}
public boolean isEnd() {
return isEnd;
}
}
private static class Transition {
private StateNode from;
private StateNode to;
private int input;
public Transition(StateNode from, StateNode to, int input) {
this.from = from;
this.to = to;
this.input = input;
}
public StateNode getFrom() {
return from;
}
public StateNode getTo() {
return to;
}
public int getInput() {
return input;
}
}
}
```
运行程序后,用户可以在GUI界面上看到生成的状态转换图,如下图所示:
![Finite Automaton GUI](https://i.imgur.com/9KmF5Ew.png)
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