How to convert true into Boolean.TRUE?

Question

Possible Duplicate:
Set Jtable/Column Renderer for booleans

Right now I have in my Jtable:

enter image description here

but I want to have:

enter image description here

Therefore ,I guess, I have to covert my trues/false's into object like:

  Object rowData[][] = { { "1", Boolean.TRUE }, { "2", Boolean.TRUE }, { "3", Boolean.FALSE },
      { "4", Boolean.TRUE }, { "5", Boolean.FALSE }, };

Right now I get the data like this:

    int i=0;
    data=new Object[tupel.size()][1];
    while(i<tupel.size()){
        row=tupel.get(i);
        data[i][0]=new Boolean(row.isTrueorFalse());//my "Boolean method"
        i++;
    }
}

So my question is:

How to convert my data into Objects so that I have diplayed the ticks?

UPDATE

The isTrueorFalse Method:

public boolean isTrueorFalse() {
        return isTrueorFalse;
}

Does your `row.isTrueorFalse()` method return `Integer` or `boolean` ? — Amit Deshpande, Oct 24 '12 at 05:38
The thing is, I get in my table the names for true and false and not the ticks! — maximus, Oct 24 '12 at 05:49

score 5 · Accepted Answer · edited May 23 '17 at 12:24

5

JTable has built_in support for Boolean value, then renderer/editor shows JCheckBox

have to override column in the XxxTableModel with proper Column Class

@Override
public Class getColumnClass(int column) {
    return getValueAt(0, column).getClass();
}

for example
for better help sooner post an SSCCE demonstrated your issue, short, runnable, compilable. otherwise every answers here could be shots to the dark

edited May 23 '17 at 12:24

Community

1
1

answered Oct 24 '12 at 06:11

mKorbel

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Overriding the `getColumnClass` is indeed the way to go – Robin Oct 24 '12 at 06:23

Amit Deshpande · Answer 2 · 2012-10-24T06:00:35.807

2

If you are sure that you want data as array like that then you can do below. I am not sure that is what you require though.

data[i][0]= i;
data[i][1] = row.isTrueorFalse();

You can then set data in table model like below

tableModel.set((Integer)data[i][0], (Boolean) data[i][1]);

edited Oct 24 '12 at 06:00

answered Oct 24 '12 at 05:50

Amit Deshpande

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ok I understand, first i get the data, but then how do you convert it into an Object to get the ticks. Pls would you be so kind to explain it a little bit further? – maximus Oct 24 '12 at 05:58
@maximus you need to set values to tableModel first as index and second as boolean then it will display check boxes – Amit Deshpande Oct 24 '12 at 06:01

score 2 · Answer 3 · answered Oct 24 '12 at 05:58

2

    data[i][0]=Boolean.valueOf(row.isTrueorFalse());

this won't create any new objects of Boolean, just Boolean.TRUE or Boolean.FALSE.

answered Oct 24 '12 at 05:58

irreputable

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thx for your answer! but then how to get the ticks? – maximus Oct 24 '12 at 06:00

Bhesh Gurung · Answer 4 · 2012-10-24T06:10:26.993

You should create your own Table Model.

Look for the following point:

If the programmer does not provide a table model object, JTable automatically creates an instance of DefaultTableModel.

And the following:

SimpleTableDemo's automatically created table model, on the other hand, does not know that the # of Years column contains numbers (which should generally be right aligned and have a particular format). It also does not know that the Vegetarian column contains boolean values, which can be represented by check boxes.

The construction should be something as follows:

JTable table = new JTable(new MyTableModel());

instead of using JTable(Object[][] rowData, Object[] columnNames) or JTable(Vector rowData, Vector columnNames). In this case it uses the DefaultTableModel, which is not intelligent enough to display your booleans as ticks (check boxes).

It also has a sample code to help you achieve what you are trying to achieve.

How to convert true into Boolean.TRUE?

4 Answers4