Scientific Calculator Source Code In Java Free Download May 2026

public void setAngleMode(boolean degree) this.degreeMode = degree;

public void clearEntry() // Implementation for clear entry

private double evaluateExpression(String expression) return new ExpressionEvaluator().evaluate(expression); scientific calculator source code in java free download

# 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 void clear() memory = 0;

public CalculatorEngine() this.memory = 0;

public static void main(String[] args) SwingUtilities.invokeLater(() -> try UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); catch (Exception e) e.printStackTrace(); new ScientificCalculator().setVisible(true); ); public void setAngleMode(boolean degree) this

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 "floor": case "ceil": case "!": case "%": case "π": case "e": case "rand": String result = engine.calculateUnary(command, currentText, isDegree); displayField.setText(result); break; default: // Handle digits, operators, and parentheses if (currentText.equals("0") && command.matches("[0-9]")) displayField.setText(command); else if (command.equals(".") && !currentText.contains(".")) displayField.setText(currentText + command); else if (command.matches("[0-9+\\-*/()]")) displayField.setText(currentText + command); else displayField.setText(currentText + command); break;