Need help regarding NullPointer Exception while using JButtons

[ashsailesh]

i am using an array of JButtons b[23]....

my objective is that when i click a button it has to change its background color to black

but it is giving a nullpointer exception....

if(ae.getActionCommand().equals("0"))
{
System.out.println("button b[o] is pressed");


b[0].setBackground(Color.black);


}


}

can anyone help me with this please........

[adarshcu]

Which line is throwing the NPE ? That will specified right next to the exception.

[ashsailesh]

b1 = new JButton("b1");

it is throwing exception at this statement ....

i defined JButton and listener globally....

[ashsailesh]

PROBLEM SOLVED....

i forgot to define frame globally....

[JamesCherrill]

Please mark this thread "solved" so nobody else wastes time reading through it only to find at the end it's solved anyway

[hfx642]

Also... following your first post,
it should be

b[1] = new JButton ("B1");