Component cannot find symbol error Java

Question

public class cellRender extends DefaultTableCellRenderer
{
    @Override
    public Component getTableCellRendererComponent(JTable tblPackage, Object value, boolean isSelected, boolean hasocus, int row, int col)
    {
        Component c = super.getTableCellRendererComponent(tblPackage, value, isSelected, hasocus, row, col);
        if(tblPackage.getColumnModel().getColumn(col).getIdentifier().equals("Package Status"))
        {
            if(value.toString().equals("ACTIVE"))
            {
                c.setBackground(Color.GREEN);
            }
        }
        return this;
    }
}

The symbol shows that it cannot find the symbol...what's the problem with that?

score 0 · Answer 1 · answered Jan 27 '14 at 08:29

I assume you're talking about a compile time error but I don't have one. This class
compiles fine (and I didn't make any changes to your code except adding import
statements). So check if you have all import statements correct.

import java.awt.Color;
import java.awt.Component;

import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;

public class cellRender extends DefaultTableCellRenderer
{
    @Override
    public Component getTableCellRendererComponent(JTable tblPackage, Object value, boolean isSelected, boolean hasocus, int row, int col)
    {
        Component c = super.getTableCellRendererComponent(tblPackage, value, isSelected, hasocus, row, col);
        if(tblPackage.getColumnModel().getColumn(col).getIdentifier().equals("Package Status"))
        {
            if(value.toString().equals("ACTIVE"))
            {
                c.setBackground(Color.GREEN);
            }
        }
        return this;
    }
}

score 0 · Answer 2 · answered Jan 27 '14 at 08:35

0

In your return statement it should be the component so use the below:

 return c;

answered Jan 27 '14 at 08:35

Rahul

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ravibagul91 · Answer 3 · 2014-01-27T11:47:23.530

In your code

return this;

this statement is wrong. Because this refers to the current object and you need to return the component.

So you need to replace this by c like

return c;

EDIT:

Try this I am not sure about this but...

tblPackage.setDefaultRenderer(Object.class, new TableCellRenderer(){
    private DefaultTableCellRenderer DEFAULT_RENDERER =  new DefaultTableCellRenderer();

            @Override
            public Component getTableCellRendererComponent(JTable tblPackage, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
                Component c = DEFAULT_RENDERER.getTableCellRendererComponent(tblPackage, value, isSelected, hasFocus, row, col);
        if(tblPackage.getColumnModel().getColumn(col).getIdentifier().equals("Package Status"))
        {
            if(value.toString().equals("ACTIVE"))
            {
                c.setBackground(Color.GREEN);
            }
        }

                return c;
            }

        });

Component cannot find symbol error Java

3 Answers3