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RectangleProgramThree - lengthTF = new JTextField(10...

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//Java program to create a window //and place four labels and four text fields / import javax.swing.*; import java.awt.*; i public class RectangleProgramThree extends JFrame { private static final int WIDTH = 400; private static final int HEIGHT = 300; private JLabel lengthL, widthL, areaL, perimeterL; private JTextField lengthTF, widthTF, areaTF, perimeterTF; public RectangleProgramThree() { setTitle("Area and Perimeter of a Rectangle"); lengthL = new JLabel("Enter the length: ", SwingConstants.RIGHT); widthL = new JLabel("Enter the width: ", SwingConstants.RIGHT); areaL = new JLabel("Area: ", SwingConstants.RIGHT); perimeterL = new JLabel("Perimeter: ", SwingConstants.RIGHT);
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Unformatted text preview: lengthTF = new JTextField(10); widthTF = new JTextField(10); areaTF = new JTextField(10); perimeterTF = new JTextField(10); Container pane = getContentPane(); pane.setLayout(new GridLayout(4, 2)); pane.add(lengthL); pane.add(lengthTF); pane.add(widthL); pane.add(widthTF); pane.add(areaL); pane.add(areaTF); pane.add(perimeterL); pane.add(perimeterTF); setSize(WIDTH, HEIGHT); setVisible(true); setDefaultCloseOperation(EXIT_ON_CLOSE); } public static void main(String args) { RectangleProgramThree rectObject = new RectangleProgramThree(); } }...
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