jTable setBackground Color of particular Row

[Anand Karia]

Hi All

Can anyone tell me how to change the background color of a particular row.

Let i have 100 rows and i just want to change the background color of 10 rows randomly having column 1 value = 1.

if (col1 == 1)
{
//wht should be the code.
}

can anyone help me to solve this problem.

[Tanveer Rameez]

use renderer. and in the renderder class change color based on row

[Anand Karia]

I tried my all effort to solve this problem but could not get through.

I just want to change the color of column # 3 and based on recordset change the color of rows.

I got an example but it colors all data into grid that has only results.

  
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
 
class MyTableCellRender extends DefaultTableCellRenderer {
 
public MyTableCellRender() {
setOpaque(true);
}
 
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
 
String number = (String)value;
int val = Integer.parseInt(number);
 
    if(val > 5){
        if(val >= 5000) {
        setForeground(Color.black);
        setBackground(Color.red);
        }
        else {
        setForeground(Color.black);
        setBackground(Color.yellow);
        }
    }
    else{
    setBackground(Color.white);
    setForeground(Color.black);
    }
 setText(value !=null ? value.toString() : "");
return this;
}
} 
 

 
import javax.swing.*;
import javax.swing.table.*;
 
public class testtt extends JFrame{
 
String[][] data = { {"0","0","5","1","0","12"}, {"5","0","2","8","0","0"}, {"50","5","0","8","0","0"}, {"8","0","0","0","5","0"}, {"0","0","8","9","0","10"} };
 
Object[] fields = {"aaa", "bbb", "ccc", "ddd", "eee", "fff"};
 
public testtt() {
setSize(500,135);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocation(200,200);
 
DefaultTableModel myModel = new DefaultTableModel(data, fields);
JTable myTable = new JTable(myModel);
myTable.setDefaultRenderer(Object.class, new MyTableCellRender());
JScrollPane x = new JScrollPane(myTable);
getContentPane().add(x);
show();
}
 
public static void main(String args[]) {
testtt t = new testtt();
}
}
 

 

[Kriti Garg]

Hi,

Try something like this

........................

if (Ur Condition Met) {
setBackground(isSelected ? table.getSelectionBackground():Color.RED);
setForeground(isSelected ? table.getSelectionForeground():Color.WHITE);

}
else {
setBackground(isSelected ? table.getSelectionBackground() : table.getBackground());
setForeground(isSelected ? table.getSelectionForeground() :
table.getForeground());

}

where table is ur JTable
Bbye

[satya kalyani]

try this in the MyTableCellRender class --

class MyTableCellRender extends DefaultTableCellRenderer 
{
    public MyTableCellRender() 
    {
        super();
        setOpaque(true);
    } 
    public Component getTableCellRendererComponent(JTable table, Object value, 
            boolean isSelected, boolean hasFocus, int row, int column) 
    { 
        if(Integer.parseInt((String)table.getValueAt(row, 0)) > 5)
        {
            setForeground(Color.black);        
            setBackground(Color.red);            
        }    
        else
        {    
            setBackground(Color.white);    
            setForeground(Color.black);    
        } 
        setText(value !=null ? value.toString() : "");
        return this;
    }
}

[Anand Karia]

thank you very much for your help.

Kriti Garg and
satya kalyani

[Megha Bhagat]

Hello friends,

I am having same problem as above.
And I have tried solution Satya Kalyani has given.
But the problem is that I am getting row rendering for one row only.
Please help me... how to solve it..

[Rob Camick]

See Table Row Rendering for one approach.

[Megha Bhagat]

Thank you Rob Camick for your suggestion but I am not getting answer from that link also.

Actually I want Row color red when it is having value less than 40 in any column.
And the code which I have shown only colors first row only as first row having value less than 40 but other rows which are having value less than 40 are having background white only.
And I started loop from 1 position because my first column contains String value and other column contains Numeric value.

I am showing my code here may anyone can suggest me that why it is not working properly.

My Renderer file is having code as below.

public class MyNewCellRenderer extends DefaultTableCellRenderer {
	
		public Component getTableCellRendererComponent(JTable table,Object value, boolean isSelected, boolean hasFocus, int row, int column) {
			
			Component cell= super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
			
			
			for(int i=1;i<table.getColumnCount();i++) {
			if((Integer)table.getValueAt(row, i) < 40)  
	        {  
	            setForeground(Color.black);          
	            setBackground(Color.red);              
	        }      
	        else  
	        {      
	            setBackground(Color.white);      
	            setForeground(Color.black);      
	        }   
			
			return cell;
		}
          }

}

So please give me suggestion so that I get rendering for each row.

[Rob Camick]

So please give me suggestion so that I get rendering for each row.

I did give you a suggestion which you completely ignored. Nowhere in my suggestion did I suggest using a custom renderer. In fact I advised against using a custom renderer.

The code I gave you checks a single value and then highlights the entire row. All you need to do is loop through all values in the row to determine the background color.

[Megha Bhagat]

I did give you a suggestion which you completely ignored. Nowhere in my suggestion did I suggest using a custom renderer. In fact I advised against using a custom renderer.

Actually I am only allowed to use Custom Rendering. So please suggest me on the basis of that criteria.