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SimpleCalculator.java

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import javax.swing.*;

import java.awt.FlowLayout;

public class SimpleCalculator {

public static void main(String[] args) {

// create a panel

JPanel windowContent = new JPanel();

// set the display manager for this panel

FlowLayout fl = new FlowLayout();

windowContent.setLayout(fl);

// create components in memory

JLabel label1 = new JLabel("Number 1");

JTextField field1 = new JTextField(10);

JLabel label2 = new JLabel("Number 2");

JTextField field2 = new JTextField(10);

JLabel label3 = new JLabel("Sum:");

JTextField result = new JTextField(10);

JButton go = new JButton("Add");

// add components on the panel

windowContent.add(label1);

windowContent.add(field1);

windowContent.add(label2);

windowContent.add(field2);

windowContent.add(label3);

windowContent.add(result);

windowContent.add(go);

// create a frame and set a panel for it

JFrame frame = new JFrame("My first Calculator");

frame.setContentPane(windowContent);

// set the size and make the frame visible

frame.setSize(400, 100);

frame.setVisible(true);

}

}