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Sonny Li
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5 files changed

+146
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‎9-graphics/BoringWindow.class

422 Bytes
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‎9-graphics/BoringWindow.java

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import javax.swing.*;
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public class BoringWindow extends JFrame {
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public static void main(String[] args) {
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JFrame f = new BoringWindow();
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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f.setSize(300, 200);
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f.setVisible(true);
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}
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}

‎9-graphics/Calculator.java

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import java.awt.BorderLayout;
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import java.awt.GridBagConstraints;
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import java.awt.GridBagLayout;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import javax.swing.JButton;
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.JTextField;
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public class Calculator implements ActionListener {
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private static JTextField inputBox;
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Calculator(){}
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public static void main(String[] args) {
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createWindow();
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}
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private static void createWindow() {
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JFrame frame = new JFrame("Calculator");
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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createUI(frame);
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frame.setSize(200, 200);
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frame.setLocationRelativeTo(null);
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frame.setVisible(true);
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}
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private static void createUI(JFrame frame) {
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JPanel panel = new JPanel();
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Calculator calculator = new Calculator();
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GridBagLayout layout = new GridBagLayout();
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GridBagConstraints gbc = new GridBagConstraints();
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panel.setLayout(layout);
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inputBox = new JTextField(10);
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inputBox.setEditable(false);
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JButton button0 = new JButton("0");JButton button1 = new JButton("1");
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JButton button2 = new JButton("2");JButton button3 = new JButton("3");
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JButton button4 = new JButton("4");JButton button5 = new JButton("5");
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JButton button6 = new JButton("6");JButton button7 = new JButton("7");
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JButton button8 = new JButton("8");JButton button9 = new JButton("9");
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JButton buttonPlus = new JButton("+");JButton buttonMinus = new JButton("-");
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JButton buttonDivide = new JButton("/");JButton buttonMultiply = new JButton("x");
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JButton buttonClear = new JButton("C");JButton buttonDot = new JButton(".");
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JButton buttonEquals = new JButton("=");
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button1.addActionListener(calculator);
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button2.addActionListener(calculator);
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button3.addActionListener(calculator);
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button4.addActionListener(calculator);
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button5.addActionListener(calculator);
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button6.addActionListener(calculator);
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button7.addActionListener(calculator);
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button8.addActionListener(calculator);
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button9.addActionListener(calculator);
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button0.addActionListener(calculator);
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buttonPlus.addActionListener(calculator);buttonMinus.addActionListener(calculator);
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buttonDivide.addActionListener(calculator);buttonMultiply.addActionListener(calculator);
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buttonClear.addActionListener(calculator);buttonDot.addActionListener(calculator);
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buttonEquals.addActionListener(calculator);
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gbc.fill = GridBagConstraints.HORIZONTAL;
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gbc.gridx = 0; gbc.gridy = 0; panel.add(button1, gbc);
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gbc.gridx = 1; gbc.gridy = 0; panel.add(button2, gbc);
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gbc.gridx = 2; gbc.gridy = 0; panel.add(button3, gbc);
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gbc.gridx = 3; gbc.gridy = 0; panel.add(buttonPlus, gbc);
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gbc.gridx = 0; gbc.gridy = 1; panel.add(button4, gbc);
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gbc.gridx = 1; gbc.gridy = 1; panel.add(button5, gbc);
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gbc.gridx = 2; gbc.gridy = 1; panel.add(button6, gbc);
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gbc.gridx = 3; gbc.gridy = 1; panel.add(buttonMinus, gbc);
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gbc.gridx = 0; gbc.gridy = 2; panel.add(button7, gbc);
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gbc.gridx = 1; gbc.gridy = 2; panel.add(button8, gbc);
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gbc.gridx = 2; gbc.gridy = 2; panel.add(button9, gbc);
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gbc.gridx = 3; gbc.gridy = 2; panel.add(buttonDivide, gbc);
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gbc.gridx = 0; gbc.gridy = 3; panel.add(buttonDot, gbc);
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gbc.gridx = 1; gbc.gridy = 3; panel.add(button0, gbc);
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gbc.gridx = 2; gbc.gridy = 3; panel.add(buttonClear, gbc);
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gbc.gridx = 3; gbc.gridy = 3; panel.add(buttonMultiply, gbc);
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gbc.gridwidth = 3;
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gbc.gridx = 0; gbc.gridy = 4; panel.add(inputBox, gbc);
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gbc.gridx = 3; gbc.gridy = 4; panel.add(buttonEquals, gbc);
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frame.getContentPane().add(panel, BorderLayout.CENTER);
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}
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public void actionPerformed(ActionEvent e) {
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String command = e.getActionCommand();
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if (command.charAt(0) == 'C') {
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inputBox.setText("");
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}else if (command.charAt(0) == '=') {
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inputBox.setText(evaluate(inputBox.getText()));
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}else {
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inputBox.setText(inputBox.getText() + command);
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}
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}
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public static String evaluate(String expression) {
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char[] arr = expression.toCharArray();
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String operand1 = "";String operand2 = "";String operator = "";
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double result = 0;
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for (int i = 0; i < arr.length; i++) {
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if (arr[i] >= '0' && arr[i] <= '9' || arr[i] == '.') {
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if(operator.isEmpty()){
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operand1 += arr[i];
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}else{
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operand2 += arr[i];
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}
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}
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if(arr[i] == '+' || arr[i] == '-' || arr[i] == '/' || arr[i] == '*') {
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operator += arr[i];
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}
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}
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if (operator.equals("+"))
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result = (Double.parseDouble(operand1) + Double.parseDouble(operand2));
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else if (operator.equals("-"))
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result = (Double.parseDouble(operand1) - Double.parseDouble(operand2));
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else if (operator.equals("/"))
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result = (Double.parseDouble(operand1) / Double.parseDouble(operand2));
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else
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result = (Double.parseDouble(operand1) * Double.parseDouble(operand2));
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return operand1 + operator + operand2 + "=" +result;
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}
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}

‎9-graphics/NextYear.class

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‎9-graphics/NextYear.java

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import javax.swing.*;
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public class Greetings {
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public class NextYear {
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public static void main (String[] args) {
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