ClassNotFoundException JSP

Question

I'm having a classNotFoundException in my jsp.

Code in my JSP:

<%@ page import="Model.Pattern" %>

<% Pattern p = new Pattern("test");%>

Can you guys tell me what's wrong with it ? I've enclosed a screenshot of the exception and the tree where the files are based.

Thanks very much.

Second error:

Pattern class:

package Model;
import java.io.Serializable;
import java.util.ArrayList;
import java.io.File;

public class Pattern implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = -2262846250404779815L;
    private String name;
    private String allConsequences;
    private Context context;
    private String allProblems;
    private String allSolutions;
    private File diagram;

    public Pattern(String nm){
        name =nm;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public File getDiagram(){
        return diagram;
    }

    public void setDiagram(File dia){
        this.diagram = dia;
    }

    public Context getContext() {
        return context;
    }

    public void setContext(Context context) {
        this.context = context;
    }

    public String getAllConsequences() {
        return allConsequences;
    }

    public void setAllConsequences(String allConsequences) {
        this.allConsequences = allConsequences;
    }

    public String getAllProblems() {
        return allProblems;
    }

    public void setAllProblems(String allProblems) {
        this.allProblems = allProblems;
    }

    public String getAllSolutions() {
        return allSolutions;
    }

    public void setAllSolutions(String allSolutions){
        this.allSolutions = allSolutions;
    }

}

Answer 1

I think the problem here is that you have specified a constructor with parameters in your Pattern class:

public Pattern(String nm){
    name =nm;
}

In that case the default constructor need to be implemented too otherwise you can't instantiate this class, try to add it to your class:

public Pattern(){  
}