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@ -5,11 +5,9 @@ import java.awt.event.ActionListener;
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import javax.script.ScriptEngineManager;
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import javax.script.ScriptEngine;
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import javax.script.ScriptException;
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public class Calculator extends JFrame implements ActionListener {
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private JTextField display;
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private StringBuilder input;
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public Calculator() {
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input = new StringBuilder();
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display = new JTextField();
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@ -20,7 +18,6 @@ public class Calculator extends JFrame implements ActionListener {
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JPanel panel = new JPanel();
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panel.setLayout(new GridLayout(4, 4, 10, 10));
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panel.setBackground(Color.GRAY);
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String[] buttons = {
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"7", "8", "9", "/",
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"4", "5", "6", "*",
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@ -36,7 +33,6 @@ public class Calculator extends JFrame implements ActionListener {
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}
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add(display, BorderLayout.NORTH);
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add(panel, BorderLayout.CENTER);
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setTitle("Calculator");
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setSize(400, 500);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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@ -62,12 +58,10 @@ public class Calculator extends JFrame implements ActionListener {
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display.setText(input.toString());
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}
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}
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private double evaluate(String expression) throws ScriptException {
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ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");
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return ((Number) engine.eval(expression)).doubleValue();
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}
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//11122222
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public static void main(String[] args) {
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SwingUtilities.invokeLater(() -> {
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Calculator calculator = new Calculator();
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