Configurando o classpath, porta serial

import javax.comm.CommPortIdentifier;
import java.util.Enumeration;

import java.io.*;
 
/**
 * Validates that the javax.comm package has been properly installed on this JRE.
 */
public class InstallComm {
 
 
	public static final String javaPath = System.getProperty("java.home");
	public static final String sep = System.getProperty("file.separator");
	
	public static final String dllPath  = javaPath+sep+"bin"+sep;
	public static final String propPath = javaPath+sep+"lib"+sep;
	public static final String jarPath  = javaPath+sep+"lib"+sep+"ext"+sep;
 
 
	public InstallComm() {
	}
 
 
	/**
	 * Returns true if all of the javax.comm package files are properly installed
	 */
	public static boolean validate() {
		String javaPath = System.getProperty("java.home");
 
		System.out.println("javaPath: "+javaPath);
		
		String sep = System.getProperty("file.separator");
		
		File dll  = new File(javaPath+sep+"bin"+sep+"win32com.dll");
		File prop = new File(javaPath+sep+"lib"+sep+"javax.comm.properties");
		File jar  = new File(javaPath+sep+"lib"+sep+"ext"+sep+"comm.jar");
 
		return dll.exists() && prop.exists() && jar.exists();
	}
	
	/**
	 * Installs the javax.comm files into their correct paths
	 */
	public static void install() {
		String javaPath = System.getProperty("java.home");
		String sep = System.getProperty("file.separator");
		String bin = javaPath+sep+"bin"+sep;
		String lib = javaPath+sep+"lib"+sep;
		
		File dll  = new File("c:"+sep+"win32com.dll");
		File prop = new File("c:"+sep+"javax.comm.properties");
		File jar  = new File("c:"+sep+"comm.jar");
 
		File new_dll  = new File(javaPath+sep+"bin"+sep+"win32com.dll");
		File new_prop = new File(javaPath+sep+"lib"+sep+"javax.comm.properties");
		File new_jar  = new File(javaPath+sep+"lib"+sep+"ext"+sep+"comm.jar");
		
		System.out.println("Copying "+dll.getName()+" to "+new_dll.getPath());
		copyFile(dll, new_dll);
		System.out.println("Copying "+prop.getName()+" to "+new_prop.getPath());
		copyFile(prop, new_prop);
		System.out.println("Copying "+jar.getName()+" to "+new_jar.getPath());
		copyFile(jar, new_jar);
		
	}
	
	private static boolean copyFile(File source, File result) {
		
		try {
			System.out.println("cmd.exe /C copy \""+source.getPath()+"\" \""+result.getAbsolutePath().replaceAll(result.getName(), "")+"\"");
			System.out.println(Runtime.getRuntime().exec("cmd.exe /C copy \""+source.getPath()+"\" \""+result.getAbsolutePath().replaceAll(result.getName(), "")+"\""));
 
			return true;
		} catch (IOException ioe) {
			try {
				System.out.println("command.com /C copy \""+source.getPath()+"\" \""+result.getAbsolutePath().replaceAll(result.getName(), "")+"\"");
				System.out.println(Runtime.getRuntime().exec("cmd.exe /C copy \""+source.getPath()+"\" \""+result.getAbsolutePath().replaceAll(result.getName(), "")+"\""));
	
				return true;
			} catch (IOException ioe2) {
				System.out.println("An error occured: " + ioe2.getMessage());
				return false;
			}
		}
	} 

	public static void main(String[] args) {
		if(!validate()) {
			System.out.println("javax.comm not installed. Installing files...");
			install();
		} else {
			System.out.println("javax.comm installed. ");
		}
	}
 
}

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import javax.comm.CommPortIdentifier;

public class PortasDisponiveis {

	private Enumeration listaDePortas;
	
	public PortasDisponiveis() {
		listaDePortas = CommPortIdentifier.getPortIdentifiers();
	}
	
	public boolean isEmpty() {
		return !listaDePortas.hasMoreElements();
	}
	
	public List<String> listarPortas() {
		List<String> lista = new ArrayList<String>();
		int i = 0;
		while(listaDePortas.hasMoreElements()) {
			CommPortIdentifier port = (CommPortIdentifier) listaDePortas.nextElement();
			lista.add(port.getName());
			System.out.println("[" + i + "] " + port.getName());
			i++;
		}
		return lista;
	}
	
	public static void main(String[] args) {
		System.out.println("<--- CommPortIdentifier TESTE --->");
		
		PortasDisponiveis portas = new PortasDisponiveis();
		//System.out.println(portas.isEmpty());
		portas.listarPortas();
		
		System.out.println("<--- FINALIZADO --->");
	}
	
	
}

Exception in thread “main” java.lang.NoClassDefFoundError: InstallComm (wrong na

me: install/InstallComm)

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$000(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClassInternal(Unknown Source)

PortasDisponiveis.java:5: package javax.comm does not exist

import javax.comm.CommPortIdentifier;

^

PortasDisponiveis.java:12: cannot find symbol

symbol  : variable CommPortIdentifier

location: class PortasDisponiveis

listaDePortas = CommPortIdentifier.getPortIdentifiers();

^

PortasDisponiveis.java:23: cannot find symbol

symbol  : class CommPortIdentifier

location: class PortasDisponiveis

CommPortIdentifier port = (CommPortIdentifier) listaDePo

rtas.nextElement();

^

PortasDisponiveis.java:23: cannot find symbol

symbol  : class CommPortIdentifier

location: class PortasDisponiveis

CommPortIdentifier port = (CommPortIdentifier) listaDePo

rtas.nextElement();

^

4 errors