AlgoVisualizer.java

import java.awt.*;

public class AlgoVisualizer {

    private Circle[] circles;   // 数据
    private AlgoFrame frame;    // 视图

    public AlgoVisualizer(int sceneWidth, int sceneHeight, int N){

        // 初始化数据
        circles = new Circle[N];
        int R = 50;
        for(int i = 0 ; i < N ; i ++ ) {
            int x = (int)(Math.random()*(sceneWidth-2*R)) + R;
            int y = (int)(Math.random()*(sceneHeight-2*R)) + R;
            int vx = (int)(Math.random()*11) - 5;
            int vy = (int)(Math.random()*11) - 5;
            circles[i] = new Circle(x, y, R, vx, vy);
        }

        // 初始化视图
        EventQueue.invokeLater(() -> {
            frame = new AlgoFrame("Welcome", sceneWidth, sceneHeight);
            new Thread(() -> {
                run();
            }).start();
        });
    }

    // 动画逻辑
    private void run(){

        while(true){
            // 绘制数据
            frame.render(circles);
            AlgoVisHelper.pause(20);

            // 更新数据
            for(Circle circle: circles)
                circle.move(0, 0, frame.getCanvasWidth(), frame.getCanvasHeight());
        }
    }

}