gistfile1.txt

public class IdentifierHeaderNode
{
	private String identifier;
	private LineNumNode next;

	// constructor
	public IdentifierHeaderNode(String identifier, LineNumNode next)
	{
		this.identifier = identifier;
		this.next = next;
	}

	// getters
	public String getIdentifier()
	{
		return identifier;
	}

	public LineNumNode getNext()
	{
		return next;
	}

	// setters
	public void setNext(LineNumNode next)
	{
		this.next = next;
	}

}

gistfile2.txt

public class LineNumNode
{
	private int lineNum;
	private LineNumNode next;

	// constructor
	public LineNumNode(int lineNum, LineNumNode next)
	{
		this.lineNum = lineNum;
		this.next = next;
	}

	// getters
	public int getLineNum()
	{
		return lineNum;
	}

	public LineNumNode getNext()
	{
		return next;
	}

	public void setNext(LineNumNode next)
	{
		this.next = next;

}
}