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QUESTION

Your assignment is to prepare and submit a paper on java programming. import java.awt.BorderLayout. import java.awt.Color. import java.awt.Container. import java.awt.FlowLayout. import java.awt.Font.

Your assignment is to prepare and submit a paper on java programming.

import java.awt.BorderLayout.

import java.awt.Color.

import java.awt.Container.

import java.awt.FlowLayout.

import java.awt.Font.

import java.awt.GridLayout.

import java.awt.Window.

import java.awt.event.ActionEvent.

import java.awt.event.ActionListener.

import java.awt.event.WindowAdapter.

import java.awt.event.WindowEvent.

import javax.swing.JButton.

import javax.swing.JDialog.

import javax.swing.JFrame.

import javax.swing.JLabel.

import javax.swing.JMenu.

import javax.swing.JMenuBar.

import javax.swing.JMenuItem.

import javax.swing.JPanel.

import javax.swing.JTextArea.

import javax.swing.JOptionPane.

public class Calculator extends JFrame implements ActionListener

{

// Variables

final int MAX_INPUT_LENGTH = 20.

final int INPUT_MODE = 0.

final int RESULT_MODE = 1.

final int ERROR_MODE = 2.

int displayMode.

boolean clearOnNextDigit, percent.

double lastNumber.

String lastOperator.

private JMenu jmenuFile, jmenuEdit, jmenuView, jmenuHelp.

private JMenuItem jmenuitemExit, jmenuitemCopy, jmenuitemPaste, jmenuitemStd,

jmenuitemSci, jmenuitemDigitGrp, jmenuitemAbout.

private JDialog dialog.

private JLabel display.

private JButton button[].

private JPanel masterPanel.

private JTextArea textarea.

Font f12 = new Font("Times New Roman", 0, 12).

Font f121 = new Font("Times New Roman", 1, 12).

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