Java.lang.NoClassDefFoundError in Linux when I execute my class

Question

I don't know to happen but I tried all things.
I compile well my .java but I have problems when I want to execute my class
the console send me the next error
Exception in thread "main" java.lang.NoClassDefFoundError : renco
1. unset CLASSPATH.
2. define my CLASSPATH again with jars that I need you
java renco
the console send me this error
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
well, this error I managed with try-catch-finally
3. compile with:
java -classpath /directory/myjar.jar renco.java
the console send mi this:
Exception in thread "main" java.lang.NoClassDefFoundError : renco
Other hand, when i use forte for java by execute my class, it execute well. I want to know what commands the IDE used.
thanks

Answer 1

this mi code
* renco.java
* Created on 22 de agosto de 2003, 8:59
* @author mloayza
import java.io.*;
import java.sql.*;
import java.util.*;
public class renco {
/** Creates a new instance of reniec */
public String sqlNoticia;
public String sqlCodigoNoticia;
public String sqlComunicado;
public String pathInc;
private Connection cn;
public static void main(String args[]) throws Exception {
renco RN = new renco();
int estado = RN.proceso();
System.out.println(estado);
public renco() throws IOException{
sqlComunicado= " SELECT TO_CHAR(fecha,'dd/mm/yyyy') fecha, "+
" resumen resumen, "+
" id_comunicado codigo "+
" FROM intranet.int_comunicado "+
" WHERE"+
" id_comunicado = (SELECT max(id_comunicado) FROM intranet.int_comunicado) ";
sqlCodigoNoticia = "SELECT MAX(codigo_nota) codigo "+
" FROM intranet.nota_prensa ";
sqlNoticia = " SELECT codigo_nota codigo, "+
" titulo_nota titulo, TO_CHAR(fecha_nota,'dd/mm/yyyy') fecha "+
" FROM intranet.nota_prensa "+
" WHERE "+
" codigo_nota > ( ? - 4) "+
" ORDER BY codigo_nota DESC";
//pathInc = this.LeeParametro("PathInc");
cn = this.getCn();
this.pathInc = "/das/por/";
public Connection getCn() {
String URL = "jdbc:oracle:thin:@200.20.12.12:1529:asdb";
String USER = "qweqwe";
String PASS = "qweqwe";
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
cn = DriverManager.getConnection(URL,USER,PASS);
catch(Exception sqle){
cn = null;
return cn;
public void closeCn(Connection cn) throws SQLException {
this.cn.close();
cn= null;
public int proceso(){
ResultSet rs = null;
StringBuffer textoComunicado = new StringBuffer();
StringBuffer textoNoticia = new StringBuffer();
int codigo = 0;
int estado = 0;
String URL = "jdbc:oracle:thin:@200.20.12.12:1529:asdb";
String USER = "qweqwe";
String PASS = "qweqwe";
textoNoticia.append("<Script Language='JavaScript1.2'>");textoNoticia.append((char)13);
textoNoticia.append("aj_scroller = new AJScroller();");textoNoticia.append((char)13);
textoNoticia.append("aj_scroller.width = 439;");textoNoticia.append((char)13);
textoNoticia.append("aj_scroller.height = 55;");textoNoticia.append((char)13);
textoNoticia.append("aj_scroller.scrollspeed = 50;");textoNoticia.append((char)13);
textoNoticia.append("aj_scroller.pausedelay = 2000;");textoNoticia.append((char)13);
textoNoticia.append("aj_scroller.pausemouseover = true;");textoNoticia.append((char)13);
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
cn = DriverManager.getConnection(URL,USER,PASS);
cn = getCn();
FileOutputStream fosCom = new FileOutputStream(pathInc+"comunicado.inc"); //archivo Comunicado
DataOutputStream dosCom = new DataOutputStream(fosCom);
FileOutputStream fosNot = new FileOutputStream(pathInc+"noticia.inc"); //archivo Comunicado
DataOutputStream dosNot = new DataOutputStream(fosNot);
//Generacion de cadena para comunicados
PreparedStatement psc = cn.prepareStatement(sqlComunicado);
rs = psc.executeQuery();
rs.next();
textoComunicado.append("<font size='1' color='#505050'><b>)");textoComunicado.append((char)13);
textoComunicado.append("("+ rs.getString("fecha") +") .- "+ rs.getString("resumen")+" ");textoComunicado.append((char)13);
textoComunicado.append("</b></font><font size='1' color='orange'><b><br>");textoComunicado.append((char)13);
textoComunicado.append("     <a href='/portal/s/portal.PIComunicado?codigo="+ rs.getString("codigo")+"'>M&aacute;s Detalles >></a>");textoComunicado.append((char)13);
textoComunicado.append("</b></font>");textoComunicado.append((char)13);
psc.close();psc=null;
rs = null;
//Generacion de cadena para comunicados
//Obtencion del codigo de la ultima noticia
PreparedStatement pscn = cn.prepareStatement(sqlCodigoNoticia);
rs = pscn.executeQuery();
rs.next();
codigo = rs.getInt("codigo");
rs = null;
PreparedStatement psn = cn.prepareStatement(sqlNoticia);
psn.setInt(1,codigo);
rs = psn.executeQuery();
while(rs.next()){
textoNoticia.append("aj_scroller.add('<table ><tr><td class=rojo><font face=\"Webdings, Wingdings\">4</font></td><td class=rojo><font size=1 color=\"#143E7B\"><p align=\"justify\"><b>"+ rs.getString("Titulo") +" ("+ rs.getString("fecha") +")</b></font></td></table>');");textoNoticia.append((char)13);
rs.close();rs=null;
textoNoticia.append("aj_scroller.display();");textoNoticia.append((char)13);
textoNoticia.append("</Script>");textoNoticia.append((char)13);
dosCom.writeBytes(textoComunicado.toString());
fosCom.close();fosCom = null;
dosCom.close();dosCom=null;
dosNot.writeBytes(textoNoticia.toString());
fosNot.close();fosNot= null;
dosNot.close();dosNot=null;
closeCn(cn);
estado=1;
}catch(IOException ioe){
estado = 0;
catch(SQLException sqle){
estado = 0;
catch(ClassNotFoundException nfce){
estado = 0;
System.out.println(nfce);
//nfce.printStackTrace();
return estado;
public String LeeParametro(String parametro) throws IOException, FileNotFoundException
     String path = System.getProperty("java.home");
          parametro = parametro.trim().toUpperCase();
          String valor = "";
     String s;
     try{
          BufferedReader br = new BufferedReader(new FileReader(path.trim().replace('\\','/')+"/Homepage.conf"));
               while ((s = br.readLine())!= null) {
                    StringTokenizer st = new StringTokenizer(s, "=");
                    while (st.hasMoreTokens()){
                         String word = st.nextToken();
                         if (word.startsWith(parametro)) {
                         valor = st.nextToken().trim();
          catch (FileNotFoundException e) {
               throw new FileNotFoundException ("Archivo no encontrado " path"/Homepage.conf");     }
          catch (IOException e) {
               throw new IOException ("Error al leer "+path+"/Homepage.conf");     }
          return valor;