JavaFX实现简易时钟效果(一)

JavaFX实现简易时钟效果(一)

本文实例为大家分享了javaFX实现简易时钟效果的具体代码，供大家参考，具体内容如下

效果图

用当前时间创建时钟，绘制表盘。

钟表是静止的。让指针动起来，请参照：绘制简易时钟（二）

主函数文件 ShowClock:

package primier;

import javafx.application.Application;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.stage.Stage;

import javafx.scene.paint.Color;

import javafx.scene.layout.*;

import javafx.scene.control.*;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.shape.Line;

public class ShowClock extends Application {

@Override //Override the start method in the Application class

public void start(Stage primaryStage) {

// 创建时钟面板

ClockPane clock = new ClockPane();

// 当前时间整理为字符串

String timeString = clock.getHour() + ":" + clock.getMinute()

+ ":" + clock.getSecond();

Label lbCurrentTime = new Label(timeString);

BorderPane pane = new BorderPane();

pane.setCenter(clock);

pane.setBottom(lbCurrentTime);

// 将时钟字符串设为靠上居中

BorderPane.setAlignment(lbCurrentTime, Pos.TOP_CENTER);

Scene scene = new Scene(pane, 250,250);

primaryStage.setTitle("Display Clock");

primaryStage.setScene(scene);

primaryStage.show();

}

public static void main (String[] args) {

Application.launch(args);

}

}

ClockPane 类

package primier;

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;

public class ClockPane extends Pane {

private int hour;

private int minute;

private int second;

// 时钟面板的宽度和高度

private double w = 250, h = 250;

/** 用当前时间创建时钟 */

public ClockPane() {

setCurrentTime();

}

/** Return hour */

public int getHour() { return hour; }

/** Return minute */

public int getMinute() { return minute; }

/** Return second */

public int getSecond() { return second; }

/** Set the current time for the clock */

public void setCurrentTime() {

// 用当前时间创建Calendar类

Calendar calendar = new GregorianCalendar();

this.hour = calendar.get(Calendar.HOUR_OF_DAY);

this.minute = calendar.get(Calendar.MINUTE);

this.second = calendar.get(Calendar.SECOND);

paintClock();

}

/** 绘制时钟 */

protected void paintClock() {

double clockRadius = Math.min(w,h)*0.4; // 时钟半径

// 时钟中心x, y坐标

double centerX = w/2;

double centerY = h/2;

// 绘制钟表

Circle circle = new Circle(centerX, centerY, clockRadius);

circle.setFill(Color.WHITE); // 填充颜色

circle.setStroke(Color.BLACK); // 笔画颜色

Text t1 = new Text(centerX-5, centerY-clockRadius+12,"12");

Text t2 = new Text(centerX-clockRadius+3, centerY +5, "9");

Text t3 = new Text(centerX+clockRadius-10, centerY+3, "3");

Text t4 = new Text(centerX-3, centerY+clockRadius-3,"6");

// 秒针

double sLength = clockRadius * 0.8;

double secondX = centerX + sLength * Math.sin(second * (2 * Math.PI / 60));

double secondY = centerY - sLength * Math.cos(second * (2 * MathhFNBVfKFIe.PI / 60));

Line sLine = new Line(centerX, centerY, secondX, secondY);

sLine.setStroke(Color.GRAY);

// 分针

double mLength = clockRadius * 0.65;

double minuteX = centerX + mLength * Math.sin(minute * (2 * Math.PI / 60));

double minuteY = centerY - mLength * Math.cos(minute * (2 * Math.PI / 60));

Line mLine = new Line(centerX, centerY, minuteX, minuteY);

mLine.setStroke(Color.BLUE);

// 时针

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);

sLine.setStroke(Color.GREEN);

// 将之前的结点清空，绘制新创建的结点

getChildren().clear();

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

}

}

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