private double factorial(int n)
public ScientificCalculator() engine = new CalculatorEngine(); initializeUI(); setTitle("Scientific Calculator"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setResizable(false); pack(); setLocationRelativeTo(null); scientific calculator source code in java free download
(Logic Engine) import java.math.BigDecimal; import java.math.RoundingMode; import java.util.Stack; public class CalculatorEngine private double memory; private boolean degreeMode = true; (Logic Engine) import java.math.BigDecimal
# Save the code as ScientificCalculator.java javac ScientificCalculator.java CalculatorEngine.java java ScientificCalculator For any issues, check that all three Java files are in the same directory and compiled together. The calculator will open as a standalone window with full scientific functionality. public class CalculatorEngine private double memory
private class ButtonClickListener implements ActionListener private String command; public ButtonClickListener(String command) this.command = command; @Override public void actionPerformed(ActionEvent e) String currentText = displayField.getText(); switch (command) case "C": engine.clear(); displayField.setText("0"); break; case "CE": engine.clearEntry(); displayField.setText("0"); break; case "=": try String result = engine.calculate(currentText, isDegree); displayField.setText(result); catch (Exception ex) displayField.setText("Error"); break; case "+/-": if (currentText.startsWith("-")) displayField.setText(currentText.substring(1)); else if (!currentText.equals("0")) displayField.setText("-" + currentText); break; case "sin": case "cos": case "tan": case "asin": case "acos": case "atan": case "sinh": case "cosh": case "tanh": case "log": case "ln": case "√": case "∛": case "x²": case "x³": case "1/x": case "
