public FileFloatSource(SchemaField field,SchemaField keyField,float defVal,String datadir){
  this.field=field;
  this.keyField=keyField;
  this.defVal=defVal;
  this.dataDir=datadir;
}

public FileFloatSource ( SchemaField field , SchemaField keyField , float defVal , String datadir ) { this . field = field ; this . keyField = keyField ; this . defVal = defVal ; this . dataDir = datadir ; }
creates a new filefloatsource
