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Figure 7-6. An even nicer looking GUI is achieved by aligning and resizing compon-
The labels are left-aligned by executing ((FlowLayout) pn-
lTemp.getLayout()).setAlignment(FlowLayout.LEFT); on each of
thetwo pnlTemp variablesthatstoresalabelandatextfield.Thismethodcallobtains
pnlTemp 's default flow layout manager and calls FlowLayout 's void setA-
lignment(int alignment) method on this instance to align the panel's com-
ponents to the left edge of the container (thanks to FlowLayout 's LEFT con-
stant)— FlowLayout leavesadefault5-pixelgaponeachsideofthepanelthatserves
as a margin.
size of the Convert to Fahrenheit button so that they have equal widths.
These tasks can be accomplished in part by introducing the following void
fixGUI(Frame) class method into the TempVerter class:
static void fixGUI(Frame f)
Panel pnl = (Panel) f.getComponents()[0]; // 1
Panel pnlRow = (Panel) pnl.getComponents()[0]; // 2
Label l1 = (Label) pnlRow.getComponents()[0]; // 3
pnlRow = (Panel) pnl.getComponents()[1]; // 4
Label l2 = (Label) pnlRow.getComponents()[0]; // 5
l1.setPreferredSize(l2.getPreferredSize()); // 6
pnlRow = (Panel) pnl.getComponents()[2]; // 7
Button btnToC = (Button) pnlRow.getComponents()[0]; // 8
Button btnToF = (Button) pnlRow.getComponents()[1]; // 9
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