org.apache.jasper.JasperException: Unable to compile class for JSP from 1.6 to 1.8

org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 1 in the generated java file The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files An error occurred at line: 1 in the generated java file The type java.util.regex.Pattern cannot be resolved. It is indirectly referenced from required .class files An error occurred at line: 1,928 in the jsp file: /index.jsp Pattern cannot be resolved to a type

INDEX.JSP

Pattern cannot be resolved to a type

{
if (mQuery != null && !mQuery.equals("") )
{
Pattern pSpaces = Pattern.compile("\"");
Matcher mat = pSpaces.matcher(mQuery);
 if(mat.find()) mQuery = mat.replaceAll(""");
}
enter code here

An error occurred at line: 1,928 in the jsp file: /index.jsp Pattern cannot be resolved

{
if (mQuery != null && !mQuery.equals("") )
{
Pattern pSpaces = Pattern.compile("\"");
Matcher mat = pSpaces.matcher(mQuery);
if(mat.find()) mQuery = mat.replaceAll(""");
}   
An error occurred at line: 1,928 in the jsp file: /index.jsp

Pattern cannot be resolved

1925: {
1926:    if (mQuery != null && !mQuery.equals("") )
1927:    {
1928:       Pattern pSpaces = Pattern.compile("\"");
1929:       Matcher mat = pSpaces.matcher(mQuery);
1930:       if(mat.find()) mQuery = mat.replaceAll(""");
1931:    } 

/index.jsp File String escapeText(String mQuery)

{
   if (mQuery != null && !mQuery.equals("") )
   {
      Pattern pSpaces = Pattern.compile("\"");
      Matcher mat = pSpaces.matcher(mQuery);
      if(mat.find()) mQuery = mat.replaceAll(""");
   }   
   return mQuery;

}

I am using Tomcat 6, Java 1.8.0.19*

Any ideas???