Programming and Problem Solving with Java

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register.setText(""+ result);

inputField.setText("");

}

}

static classClearHandler implementsActionListener

{

public voidactionPerformed(ActionEvent event)

{

result = 0.0;

register.setText("0.0");

inputField.setText("");

}

}

public static void main(String[] args)

{

operation = newNumericHandler();

clearOperation = newClearHandler();

result = 0.0;

resultLabel = newJLabel("Result:");

register = newJLabel("0.0", JLabel.RIGHT);

entryLabel = newJLabel("Enter #:");

inputField = newJTextField("", 10 );

add = newJButton("+");

subtract = newJButton("-");

clear = newJButton("Clear");

add.addActionListener(operation);

subtract.addActionListener(operation);

clear.addActionListener(clearOperation);

calcFrame = newJFrame();

calcFrame.setSize( 300 , 200 );