基本上我的程序应该显示一个框架，其中一个面板根据来自我个人电脑上串行连接的“输入”数据（整数值）在屏幕上绘制一个点。
问题是：如何将值从串口“传输”到OTHER类Frame并调用REPAINT（）方法??????????
鉴于通过控制台我通过UART正确接收每个数据，我使用的方法是通过EventDriven ...我得到的数据是好的...它们在控制台中输出，我得到了我期望的值。但是由于创建主框架和子面板的类是另一个类，如何在每次收到数据时从事件驱动例程调用重绘方法????
以下是MainProgram的代码（它显示框架并在西侧创建一个子面板）：
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;
import javax.swing.JRootPane;
public class ArtificialHorizon{
/**
* Artificial Horizont program
* written in Java 1.6.12 (on Debian 5.0 Lenny)
*
* @author wilhem
* starting date: 15 Januar 2010
*
* last update: 18 Januar 2010
*/
/********************************
* Getting the size of the screen
********************************/
private Dimension dimScreenSize = Toolkit.getDefaultToolkit().getScreenSize();
private int xLocation;
private int yLocation;
/**************************
* Definition of the frame
* for the main application
*************************/
@SuppressWarnings("static-access")
public void start(){
JFrame mainFrame = new JFrame("Artificial Horizont");
mainFrame.setUndecorated(true);
mainFrame.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setSize(1024, 768);
xLocation = (dimScreenSize.width- mainFrame.getWidth()) / 2;
yLocation = (dimScreenSize.height - mainFrame.getHeight()) / 2;
mainFrame.setLocation(xLocation, yLocation);
mainFrame.setResizable(true);
mainFrame.setLayout(new BorderLayout());
/********************************************
* Creating the Left PANEL
* which contains the Left Artificial Horizon
* for FILTERED Outputs (Processed by Kalman)
********************************************/
ArtificialHorizonPanel leftPanel = new ArtificialHorizonPanel();
ArtificialHorizonPanel rightPanel = new ArtificialHorizonPanel();
mainFrame.getContentPane().add(BorderLayout.WEST, leftPanel);
mainFrame.setVisible(true);
/************************************************
* Create the class RS232 and the Object "serial"
***********************************************/
SerialConnection serial = new SerialConnection("/dev/ttyUSB0", 9600);
}
public static void main(String[] args) {
ArtificialHorizon artificialHorizon = new ArtificialHorizon();
artificialHorizon.start(); // Starting the application
}
}
Hre是Subpanel的类（请注意代码尚未完成...因为我无法“读取”并在收到新数据时重新显示面板上的drwa）：
import gnu.io.SerialPortEventListener;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JPanel;
public class ArtificialHorizonPanel extends JPanel{
/************************************
* In this Class the Artificial Horizon
************************************/
/****************************
* Defining instance variables
****************************/
private Color blueSky;
private Color orangeEarth;
private Dimension dimPanel;
private Point2D centerPoint;
private int side = 4;
/************************************
* Thic constructor will create
* the initial panel for the Horizon
************************************/
public ArtificialHorizonPanel(){
dimPanel = new Dimension(400, 700);
setPreferredSize(dimPanel);
setBackground(Color.black);
centerPoint = new Point2D.Double(dimPanel.getWidth()/2, dimPanel.getHeight()/2); // Create a point in the middle of the panel
blueSky = new Color(10, 112, 156);
orangeEarth = new Color(222, 132, 14);
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2d = (Graphics2D)g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Rectangle2D rect = new Rectangle2D.Double((centerPoint.getX() - side/2), (centerPoint.getY() - side/2), side, side);
g2d.setPaint(Color.orange);
g2d.draw(rect);
}
}
这里是serialdata类的代码......（完美地工作）：
import gnu.io.CommPortIdentifier;
import gnu.io.PortInUseException;
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;
import gnu.io.UnsupportedCommOperationException;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.TooManyListenersException;
public class SerialConnection implements SerialPortEventListener{
private Enumeration portList = null;
private CommPortIdentifier portId = null;
private String defaultPort = null;
private boolean portFound = false;
private int baudRate = 0;
private SerialPort serialPort = null;
private DataInputStream is = null;
private BufferedReader inStream;
/********************************
* Constructor for the base class
*******************************/
public SerialConnection(String defaultPort, int baudrate){
this.defaultPort = defaultPort;
checkPorts(); // Call a method for checking ports on the System
}
/************************************
* This method checks the presence of
* ports on the System, in affirmative
* case initializes and configures it
* to receive data on the serial port
***********************************/
public void checkPorts(){
/***************************************
* Get a list of all ports on the system
**************************************/
portList = CommPortIdentifier.getPortIdentifiers();
System.out.println("List of all serial ports on this system:");
while(portList.hasMoreElements()){
portId = (CommPortIdentifier)portList.nextElement();
if(portId.getName().equals(defaultPort)){
portFound = true;
System.out.println("Port found on: " + defaultPort);
initialize(); // If Port found then initialize the port
}
}
if(!portFound){
System.out.println("No serial port found!!!");
}
}
public void initialize(){
/**********************
* Open the serial port
*********************/
try{
serialPort = (SerialPort)portId.open("Artificial Horizont", 2000);
} catch (PortInUseException ex){
System.err.println("Port already in use!");
}
// Get input stream
try{
is = new DataInputStream(serialPort.getInputStream());
} catch (IOException e){
System.err.println("Cannot open Input Stream " + e);
is = null;
}
try{
serialPort.setSerialPortParams(this.baudRate,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException ex){
System.err.println("Wrong settings for the serial port: " + ex.getMessage());
}
try{
serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
} catch (UnsupportedCommOperationException ex){
System.err.println("Check the flow control setting: " + ex.getMessage());
}
// Add an event Listener
try{
serialPort.addEventListener(this);
} catch (TooManyListenersException ev){
System.err.println("Too many Listeners! " + ev);
}
// Advise if data available to be read on the port
serialPort.notifyOnDataAvailable(true);
}
/**********************************
* Method from interface definition
*********************************/
public void serialEvent(SerialPortEvent event){
inStream = new BufferedReader(new InputStreamReader(is), 5);
String rawInput = null;
switch(event.getEventType()){
case SerialPortEvent.BI:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.FE:
case SerialPortEvent.OE:
case SerialPortEvent.PE:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
try {
while((rawInput = inStream.readLine()) != null){
System.out.println(rawInput);
/*
!!!!!!!!!!!!!!!!!!!!!!!!!!!!HERE I GET THE VALUE FROM THE SERIAL PORT AND THOSE MUST BE "VISIBLE" TO THE SUBPANEL CLASS IN ORDER AND RUN THE METHOD REPAINT!!!!!!!!!!!!!!!!!!!!!
*/
}
inStream.close();
} catch (IOException e) {
e.printStackTrace();
System.exit(-1);
}
break;
default:
break;
}
}
}
再次......整个代码运行但我得到框架和子面板工作，并在backgrounf中通过串行连接但在控制台中得到的值......