JAVAfx画时钟(3)

public class ee extends Application {

// Create a clock and a label

public ClockPane clock = new ClockPane();

@Override // Override the start method in the Application class public void start(Stage primaryStage) {

HBox hBox = new HBox(); hBox.setSpacing(10);

hBox.setAlignment(Pos.CENTER);

// Place clock and label in border pane BorderPane pane = new BorderPane(); pane.setCenter(clock); pane.setBottom(hBox);

BorderPane.setAlignment(hBox, Pos.CENTER);

// Create a scene and place it in the stage Scene scene = new Scene(pane, 250, 250);

primaryStage.setTitle(\); // Set the stage title primaryStage.setScene(scene); // Place the scene in the stage primaryStage.show(); // Display the stage }

public static void main(String[] args) { } }

launch(args);

实验二源代码

package qw;

import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.control.Button; import javafx.scene.layout.HBox; import javafx.geometry.Pos; import javafx.stage.Stage; import javafx.scene.Scene;

import javafx.scene.layout.BorderPane;

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import java.util.Calendar;

import java.util.GregorianCalendar;

import javafx.scene.layout.Pane; import javafx.scene.paint.Color; import javafx.scene.shape.Circle; import javafx.scene.shape.Line; import javafx.scene.text.Text; import javafx.util.Duration;

class ClockPane extends Pane { private int hour; private int minute; private int second;

// Clock pane's width and height private double w = 250, h = 250;

/** Construct a default clock with the current time*/ public ClockPane() { setCurrentTime(); }

/** Construct a clock with specified hour, minute, and second */ public ClockPane(int hour, int minute, int second) { this.hour = hour; this.minute = minute; this.second = second; paintClock(); }

/** Return hour */ public int getHour() { return hour; }

/** Set a new hour */

public void setHour(int hour) { this.hour = hour; paintClock(); }

/** Return minute */

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public int getMinute() { return minute; }

/** Set a new minute */

public void setMinute(int minute) { this.minute = minute; paintClock(); }

/** Return second */ public int getSecond() { return second; }

/** Set a new second */

public void setSecond(int second) { this.second = second; paintClock(); }

/** Return clock pane's width */ public double getW() { return w; }

/** Set clock pane's width */ public void setW(double w) { this.w = w; paintClock(); }

/** Return clock pane's height */ public double getH() { return h; }

/** Set clock pane's height */ public void setH(double h) { this.h = h; paintClock(); }

/* Set the current time for the clock */

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public void setCurrentTime() {

// Construct a calendar for the current date and time Calendar calendar = new GregorianCalendar();

// Set current hour, minute and second

this.hour = calendar.get(Calendar.HOUR_OF_DAY); this.minute = calendar.get(Calendar.MINUTE); this.second = calendar.get(Calendar.SECOND);

paintClock(); // Repaint the clock }

/** Paint the clock */ public void paintClock() { // Initialize clock parameters

double clockRadius = Math.min(w, h) * 0.8 * 0.5; double centerX = w / 2; double centerY = h / 2;

// Draw circle

Circle circle = new Circle(centerX, centerY, clockRadius); circle.setFill(Color.WHITE); circle.setStroke(Color.BLACK);

Text t1 = new Text(centerX - 5, centerY - clockRadius + 12, \); Text t2 = new Text(centerX - clockRadius + 3, centerY + 5, \); Text t3 = new Text(centerX + clockRadius - 10, centerY + 3, \); Text t4 = new Text(centerX - 3, centerY + clockRadius - 3, \);

// Draw second hand

double sLength = clockRadius * 0.8; double secondX = centerX + sLength * Math.sin(second * (2 * Math.PI / 60)); double secondY = centerY - sLength * Math.cos(second * (2 * Math.PI / 60));

Line sLine = new Line(centerX, centerY, secondX, secondY); sLine.setStroke(Color.RED);

// Draw minute hand

double mLength = clockRadius * 0.65; double xMinute = centerX + mLength * Math.sin(minute * (2 * Math.PI / 60)); double minuteY = centerY - mLength * Math.cos(minute * (2 * Math.PI / 60));

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Line mLine = new Line(centerX, centerY, xMinute, minuteY); mLine.setStroke(Color.BLUE);

// Draw hour hand

double hLength = clockRadius * 0.5; double hourX = centerX + hLength *

Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)); double hourY = centerY - hLength *

Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)); Line hLine = new Line(centerX, centerY, hourX, hourY); hLine.setStroke(Color.GREEN);

getChildren().clear();

getChildren().addAll(circle, t1, t2, t3, t4, sLine, mLine, hLine); } }

public class qw extends Application {

// Create a clock and a label

public ClockPane clock = new ClockPane();

@Override // Override the start method in the Application class public void start(Stage primaryStage) {

HBox hBox = new HBox(); hBox.setSpacing(10);

hBox.setAlignment(Pos.CENTER); Button btStop = new Button(\); Button btStart = new Button(\); hBox.getChildren().add(btStop); hBox.getChildren().add(btStart);

// Place clock and label in border pane BorderPane pane = new BorderPane(); pane.setCenter(clock); pane.setBottom(hBox);

BorderPane.setAlignment(hBox, Pos.CENTER);

// Create a scene and place it in the stage Scene scene = new Scene(pane, 250, 250);

primaryStage.setTitle(\); // Set the stage title primaryStage.setScene(scene); // Place the scene in the stage

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