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121 lines
3.5 KiB
121 lines
3.5 KiB
package java6324.lesson06;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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public class Calculator extends JFrame {
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private JTextField input1, input2, result;
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private JButton addButton, subtractButton, multiplyButton, divideButton, modButton;
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private JPanel panel;
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public Calculator() {
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setTitle("Simple Calculator");
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setSize(300, 200);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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setLayout(new GridLayout(5, 4, 5, 5));
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panel = new JPanel();
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panel.setLayout(new GridLayout(5, 4, 5, 5));
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input1 = new JTextField(5);
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input2 = new JTextField(5);
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result = new JTextField(5);
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result.setEditable(false);
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addButton = new JButton("+");
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subtractButton = new JButton("-");
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multiplyButton = new JButton("*");
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divideButton = new JButton("/");
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modButton = new JButton("%");
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addButton.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent e) {
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calculate(1);
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}
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});
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subtractButton.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent e) {
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calculate(2);
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}
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});
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multiplyButton.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent e) {
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calculate(3);
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}
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});
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divideButton.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent e) {
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calculate(4);
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}
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});
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modButton.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent e) {
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calculate(5);
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}
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});
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panel.add(new JLabel("Input 1:"));
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panel.add(input1);
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panel.add(new JLabel("Input 2:"));
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panel.add(input2);
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panel.add(addButton);
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panel.add(subtractButton);
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panel.add(multiplyButton);
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panel.add(divideButton);
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panel.add(modButton);
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panel.add(new JLabel());
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panel.add(result);
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add(panel);
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setVisible(true);
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}
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private void calculate(int operation) {
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try {
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double num1 = Double.parseDouble(input1.getText());
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double num2 = Double.parseDouble(input2.getText());
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double res = 0;
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switch (operation) {
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case 1:
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res = num1 + num2;
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break;
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case 2:
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res = num1 - num2;
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break;
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case 3:
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res = num1 * num2;
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break;
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case 4:
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if (num2 != 0) {
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res = num1 / num2;
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} else {
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result.setText("Error");
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return;
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}
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break;
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case 5:
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if (num2 != 0) {
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res = num1 % num2;
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} else {
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result.setText("Error");
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return;
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}
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break;
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}
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result.setText(String.valueOf(res));
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} catch (NumberFormatException e) {
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result.setText("Invalid Input");
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}
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}
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public static void main(String[] args) {
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new Calculator();
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}
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}
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