package com.tur.demo;



import javax.swing.*;

import java.awt.*;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Random;



class DataReceiver extends JPanel {

    private List<Integer> values;                      // 保存接收到的数据的容器.

    private static final int MAX_VALUE = 200;          // 接收到的数据的最大值.

    private static final int MAX_COUNT_OF_VALUES = 50; // 最多保存数据的个数.



    public DataReceiver() {

        values = Collections.synchronizedList(new ArrayList<Integer>());



        // 使用一个线程模拟产生数据.

        new Thread(new Runnable() {

            @Override

            public void run() {

                Random rand = new Random();



                try {

                    while (true) {

                        addValue(rand.nextInt(MAX_VALUE)); // 产生一个数据，并模拟接收并放到容器里.

                        repaint();

                        Thread.sleep(100);

                    }

                } catch (InterruptedException e) {

                    e.printStackTrace();

                }

            }

        }).start();

    }



    @Override

    public void paintComponent(Graphics g) {

        super.paintComponent(g);



        Graphics2D g2d = (Graphics2D) g;

        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);



        int w = getWidth();

        int h = getHeight();