在 Java 中创建动画

Sheeraz Gul 2024年2月15日
在 Java 中创建动画

Java Swing 库中的 JFrame 类可用于在 Java 中创建不同的图形和动画。直到 JDK 8 小程序用来创建动画,但后来被删除了,加入了 JAVA swing。

本教程将讨论和演示使用 Java 创建动画。

在 Java 中使用 JFrame 类创建动画

使用 JFrame,我们可以决定动画的颜色、形状和时间。让我们创建一个包含三部分但六种颜色的二维旋转饼图。

package delftstack;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Insets;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JFrame;

public class Animation extends JFrame {
  private static int DELAY = 500; // The speed on which the animation will run

  Insets animate_insets;

  Color colors[] = {Color.PINK, Color.GREEN, Color.ORANGE, Color.BLACK, Color.WHITE, Color.MAGENTA};

  public void paint(Graphics demo) {
    super.paint(demo);
    if (animate_insets == null) {
      animate_insets = getInsets();
    }
    int a = animate_insets.left;
    int b = animate_insets.top;
    int animation_width = getWidth() - animate_insets.left - animate_insets.right;
    int animation_height = getHeight() - animate_insets.top - animate_insets.bottom;
    int animation_start = 0;
    int animation_steps = colors.length;
    int animation_stepSize = 720 / animation_steps;
    synchronized (colors) {
      for (int i = 0; i < animation_steps; i++) {
        demo.setColor(colors[i]);
        demo.fillArc(a, b, animation_width, animation_height, animation_start, animation_stepSize);
        animation_start += animation_stepSize;
      }
    }
  }

  public void go() {
    TimerTask animation_task = new TimerTask() {
      public void run() {
        Color animation_color = colors[0];
        synchronized (colors) {
          System.arraycopy(colors, 1, colors, 0, colors.length - 1);
          colors[colors.length - 1] = animation_color;
        }
        repaint();
      }
    };
    Timer animation_timer = new Timer();
    animation_timer.schedule(animation_task, 0, DELAY);
  }

  public static void main(String args[]) {
    Animation Demo_Animation = new Animation();
    Demo_Animation.setSize(400, 400);
    Demo_Animation.show();
    Demo_Animation.go();
  }
}

上面的代码将生成一个包含三个部分和六种不同颜色的旋转饼图。

输出:

Java 中的动画

我们可以使用 Java swing 库创建具有不同形状和颜色的动画。

作者: Sheeraz Gul
Sheeraz Gul avatar Sheeraz Gul avatar

Sheeraz is a Doctorate fellow in Computer Science at Northwestern Polytechnical University, Xian, China. He has 7 years of Software Development experience in AI, Web, Database, and Desktop technologies. He writes tutorials in Java, PHP, Python, GoLang, R, etc., to help beginners learn the field of Computer Science.

LinkedIn Facebook