setFont( new Font("Monospaced", Font.BOLD, 24) );
addContainerListener( this );
gbc.gridwidth=4;
addGB( this, theDisplay, 0, 0 );
// make the top row
Panel topRow = new Panel();
topRow.addContainerListener( this );
gbc.gridwidth = 1;
gbc.weightx = 1.0;
addGB( topRow, new Button("C"), 0, 0 );
gbc.weightx = 0.33;
addGB( topRow, new Button("%"), 1, 0 );
gbc.weightx = 1.0;
addGB( topRow, new Button("+"), 2, 0 );
gbc.gridwidth = 4;
addGB( this, topRow, 0, 1 );
gbc.weightx = 1.0; gbc.gridwidth = 1;
// make the digits
for(int j=0; j<3; j++)
for(int i=0; i<3; i++)
addGB( this, new Button( "" + ((2-j)*3+i+1) ), i, j+2 );
// -, x, and divide
addGB( this, new Button("-"), 3, 2 );
addGB( this, new Button("x"), 3, 3 );
addGB( this, new Button("\u00F7"), 3, 4 );
// make the bottom row
Panel bottomRow = new Panel();
bottomRow.addContainerListener( this );
gbc.weightx = 1.0;
addGB( bottomRow, new Button("0"), 0, 0 );
gbc.weightx = 0.33;
addGB( bottomRow, new Button("."), 1, 0 );
gbc.weightx = 1.0;
addGB( bottomRow, new Button("="), 2, 0 );
gbc.gridwidth = 4;
addGB( this, bottomRow, 0, 5 );
