Problem with ArrayList toArray method

[Brett Wiggins]

Hi,

I am having some problems getting an array from an ArrayList. My code is as follows;

    
                                courseLocations = course.getCampusLocations();
				Campus[] campusArray = new Campus[courseLocations.size()];
				campusArray = courseLocations.toArray(campusArray);

That seems to be fine but when I try and use the array as a constructor argument;

 newUnit = new Unit(unitCode,unitTitle,type,campusArray);   

I get;

  
CourseAdministration.java:127: cannot find symbol
symbol  : constructor Unit(java.lang.String,java.lang.String,courseType,Campus[])
location: class Unit
				newUnit = new Unit(unitCode,unitTitle,type,campusArray);
				          ^
1 error
 

any help would be cool.

[Pramod P Deore]

is unitCode,unitTitle are String ? and type is courseType?

It will be easy if you show the code of constructor Unit(...)

[Christophe Verré]

Can you show us the constructors of your Unit class ?

[Brett Wiggins]

  
public Unit(String unitCode,String unitTitle,unitType unittype,Campus... campus){
		
		this.unitCode = unitCode;
		this.unitTitle = unitTitle;
		this.unittype = unittype;
		this.completed = false;
		for(Campus unitCampus : campus){
			unitLocations.add(unitCampus);
		}
			
	}
  

[Christophe Verré]

what about Pramod's question ? is unitCode,unitTitle are String ? and type is unitType ?

[Mike Simmons]

Looks like the problem is in the third parameter. The constructor expects the third parameter to be a unitType, but you're trying to pass in a courseType.

[Mike Simmons]

The types that the constructor expects were defined in the constructor, just shown. The types that were being passed in were revealed in the error message:

CourseAdministration.java:127: cannot find symbol  
symbol  : constructor Unit(java.lang.String,java.lang.String,courseType,Campus[])  

This tells us it's looking for a Unit constructor that takes (String, String, courseType, Campus[]), but it can't find that combination.

By the way, it's generally a bad idea to have class names that begin with lowercase letters. They defy well-established standard convention. The compiler doesn't care, but such names tend to mislead the humans who look at your code and try to help you. Class names are expected to begin in uppercase; variable names begin with lowercase.

[Brett Wiggins]

Pramod P Deore wrote:is unitCode,unitTitle are String ? and type is courseType?

It will be easy if you show the code of constructor Unit(...)

they are Strings', the type and CourseType refer to enums. Thankyou for your help. I have fixed the problem

[Brett Wiggins]

Thanks for all the help. I had two different enums. unitType and courseType. I have replaced the two enums with just one and it has worked
like magic and fixed the problem. Everyone here seems to be noob friendly.

[Mike Simmons]

Wait, you're a noob? Crap. There goes the neighborhood...