Errors in constructor

[ai_2007]

I have written a class with the constructor below, but an error message pops up saying :

return type required ;
identifier expected

What does it mean by return type required and how would I know what return type to enter and where?

 public ShaftNodePlugin(String name, String description, String graphicClass, Class class, String classPanelPlugin, boolean accesibleByWebServices) {
      super(name, description, graphicClass, accesibleByWebServices, accesibleByWebServices, null);
      this.class = class;
      this.classPanelPlugin = classPanelPlugin;
   }

And for the

this.class = class;

line,

the error message is :

'{' expected ;
identifier expected

 this.classPanelPlugin = classPanelPlugin;

For the above line of code, the error is :

illegal start of type;
identifier expected

I do not know why do these error messages pop up, so please help me resolve these errors.