Thread: Why is object reference showing in JTable when editing cell?

I'm using a custom CellRenderer, see code below. I have a feeling something I'm doing in this is causing the problem. The CellRenderer itself seems to work fine showing the actual value, but when I edit the cell, I see an object reference instead of the actual value.

Here's the code:

public class PlannerCellRenderer extends JLabel implements TableCellRenderer, Serializable {
	private static final long serialVersionUID = 1L;
	private Border unselectedBorder = null;
	private Border selectedBorder = null;
	boolean isBordered = true;
 
	public PlannerCellRenderer(boolean isBordered) {
		super();
		this.isBordered = isBordered;
		setOpaque(true);  // MUST do this for background to show up.
	}
 
	public Component getTableCellRendererComponent(JTable table, Object cell, boolean isSelected, boolean hasFocus, int row, int column) {
		Color newColor;
		if(cell == null) {
			super.setText("");
			if (isSelected) {
				super.setBackground(new Color(50,50,100));
	        } else {
	    		super.setBackground(new Color(255,255,255));
	        }
			return this;
		}
		if(column == 0 ) {
			super.setText((String)cell);
			super.setBackground(new Color(255,255,255));
			super.setForeground(new Color(0,0,0));
			super.setHorizontalAlignment(JLabel.LEFT);
			return this;
		}
		switch(((DisplayCell)cell).getCellType()) {
			case DisplayCell.BLANK:
				newColor = new Color(255,255,255);  // White
				break;
			case DisplayCell.FIRSTTYPE:
				newColor = new Color(128,128,128);	// Grey
				break;
			case DisplayCell.SECONDTYPE:
				newColor = new Color(0,255,0);		// Green
				break;
			default:
				newColor = new Color(255,255,255);	// White
				break;
		}
 
		if(((DisplayCell)cell).getNumberResources() == 0) {
			super.setText("");
		} else {
			super.setText(Integer.toString(((DisplayCell)cell).getNumberResources()));
		}
 
		super.setHorizontalAlignment(JLabel.CENTER);
		if (isSelected) {
			super.setBackground(new Color(50, 50, 100));
        } else {
    		super.setBackground(newColor);
        }
 
        setToolTipText(DisplayCell.CELLTYPE[((DisplayCell)cell).getCellType()]);
        return this;
	}
 
}

Exactly. But, I only see something similar to "java.lang.Object@1ba34f2" when I click on the cell to edit it. It displays fine otherwise.

OK, I found my own problem.

The toString() method is called on the object the CellRenderer is displaying. In my case, DisplayCell. I failed to override the toString() method for this, so the default was returning the reference string name.