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copied!<p>I would suggest GroupLayout. It is more complicated to put together - you have to understand how it works. I believe this layout was designed to work with visual layout tools, but I find myself using it manually in practically every panel I build -- especially user interface panels with common form elements. It would seem perfect for a calculator application with this layout:</p> <pre> +---------------+ | Display | +---+---+---+---+ | 7 | 8 | 9 | / | +---+---+---+---+ | 4 | 5 | 6 | x | +---+---+---+---+ | 1 | 2 | 3 | - | +---+---+---+---+ | 0 | . | = | + | +---+---+---+---+ </pre> <p>Here is the constructor:</p> <pre> public CalculatorPanel() { GroupLayout layout = new GroupLayout(this); layout.setAutoCreateGaps(true); layout.setAutoCreateContainerGaps(true); this.setLayout(layout); layout.setVerticalGroup(layout.createSequentialGroup() .addComponent(this.displayTextField) .addGroup(layout.createParallelGroup() .addComponent(this.sevenButton) .addComponent(this.eightButton) .addComponent(this.nineButton) .addComponent(this.divideButton)) .addGroup(layout.createParallelGroup() .addComponent(this.fourButton) .addComponent(this.fiveButton) .addComponent(this.sixButton) .addComponent(this.multiplyButton)) .addGroup(layout.createParallelGroup() .addComponent(this.oneButton) .addComponent(this.twoButton) .addComponent(this.threeButton) .addComponent(this.minusButton)) .addGroup(layout.createParallelGroup() .addComponent(this.zeroButton) .addComponent(this.decimalButton) .addComponent(this.equalsButton) .addComponent(this.plusButton))); layout.setHorizontalGroup(layout.createParallelGroup() .addComponent(this.displayTextField) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup() .addComponent(this.sevenButton) .addComponent(this.fourButton) .addComponent(this.oneButton) .addComponent(this.zeroButton)) .addGroup(layout.createParallelGroup() .addComponent(this.eightButton) .addComponent(this.fiveButton) .addComponent(this.twoButton) .addComponent(this.decimalButton)) .addGroup(layout.createParallelGroup() .addComponent(this.nineButton) .addComponent(this.sixButton) .addComponent(this.threeButton) .addComponent(this.equalsButton)) .addGroup(layout.createParallelGroup() .addComponent(this.divideButton) .addComponent(this.multiplyButton) .addComponent(this.minusButton) .addComponent(this.plusButton)))); } </pre>

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