Could you make dynmically textfields, labels, and buttons

[bobby, morkos]

If I have a query that returns some values, I want to display it within labels, textfields, and buttons.
e.g. query that returns 5 recordset, then I want to have 5 labels, textfields, and buttons.

Another e.g. . query that returns 2 recordset, then I want to have 2 labels, textfields, and buttons.

[lavanya subramanian]

hi bobby,
i'm not sure of what you are asking,see if this helps you,
yes we can create dynamic labels,textfields and buttons.
while(resultset.next())
{
TextFeild t = new TextField();
Label l = new Label();
Button b = new Button();
}
but if you are using the got out values to do some work then better get the number of components and declare those as label[],textfield[]and button[] arrays and initialize.

hope this would help u,
lavanya

[bobby, morkos]

Is this what you mean, by the way I can't seem to get the idea, please help. Thanks.
JPanel pnlMain = new JPanel();
TextField t[] = new TextField();
Label l[] = new Label();
Button b[] = new Button();
for (int i=0; i < 4; i++){
btnName[i].setText(">> Name " + i);
pnlMain.add(btnName[i]);
}

Originally posted by lavanya subramanian:
hi bobby,
i'm not sure of what you are asking,see if this helps you,
yes we can create dynamic labels,textfields and buttons.
while(resultset.next())
{
TextFeild t = new TextField();
Label l = new Label();
Button b = new Button();
}
but if you are using the got out values to do some work then better get the number of components and declare those as label[],textfield[]and button[] arrays and initialize.

hope this would help u,
lavanya

[lavanya subramanian]

hi bobby,

JPanel pnlMain = new JPanel();
TextField t[] = new TextField();
Label l[] = new Label();
Button b[] = new Button();//change here to declare the array to new Button[4];
for (int i=0; i < 4; i++){
b[i]=new Button("Name'+i);
pnlMain.add(b[i]);
}

i think this is what u asked for
lavanya

[bobby, morkos]

I'm having difficulty with textfields, I have done something like show below and it compiled, but I get an error in runtime. Could you tell me what I need wrong with textfields. I'm trying everything and I can't figure it out. Please help?
JPanel pnlMain = new JPanel();
TextField t[] = new TextField[4];
Label l[] = new Label();
Button b[] = new Button();//change here to declare the array to new Button[4];
for (int i=0; i < 4; i++){
b[i]=new Button("Name" + i);
t[i].setText("text " + i);
pnlMain.add(b[i]);
}

Originally posted by lavanya subramanian:
hi bobby,

JPanel pnlMain = new JPanel();
TextField t[] = new TextField();
Label l[] = new Label();
Button b[] = new Button();//change here to declare the array to new Button[4];
for (int i=0; i < 4; i++){
b[i]=new Button("Name'+i);
pnlMain.add(b[i]);
}

i think this is what u asked for
lavanya

[Nathan Pruett]

You are confusing an array of objects with the objects inside it...

This declares an array of Textfields:

TextField[] tf;

This instantiates the array:

tf = new TextField[4];

And this instantites an object in the array:

tf[0] = new TextField();

So, to create an array and all the objects inside it, you would do something like this -

TextField[] tf = new TextField[4];
for( int i = 0; i < tf.length; i++ ) {
    tf[i] = new TextField();
}

Only after you instantiate the things inside the array can you call their methods or get their attributes. This would be why you were having a problem with the line -

t[i].setText( "text" + i );

in your code. The array had been instantiated, but the TextFields inside it had not.

-Nate

[bobby, morkos]

Thanks a lot for your help. And if I'm correct to get the value of the textfield, I do something like this:
e.g. if there's 4 textfields.
for (int j=0; j<4; j++){
t[j].getText();
}

Originally posted by Nathan Pruett:
You are confusing an array of objects with the objects inside it...

This declares an array of Textfields:

TextField[] tf;

This instantiates the array:

tf = new TextField[4];

And this instantites an object in the array:

tf[0] = new TextField();

So, to create an array and all the objects inside it, you would do something like this -

TextField[] tf = new TextField[4];
for( int i = 0; i < tf.length; i++ ) {
    tf[i] = new TextField();
}

Only after you instantiate the things inside the array can you call their methods or get their attributes. This would be why you were having a problem with the line -

t[i].setText( "text" + i );

in your code. The array had been instantiated, but the TextFields inside it had not.

-Nate