private void execute() { if (sourceFile == null) { printError("-i : No source file specified"); } if (assembler == null || computer == null) { printError("-f : No format specified"); } if (assembler.hasErrors()) { printError("Unable to execute file due to errors"); } print("...preparing to execute program"); if (trace) { print("...opening computer trace files"); addTraceListeners(); } computer.setExecutionSpeed(ExecutionSpeed.FULL); computer.setInstructions(assembler.getInstructions()); computer.addComputerListener( new ComputerAdapter() { public void computerStarted(Computer computer) { print("...Execution started"); } public void computerStopped(Computer computer) { print("...Execution complete"); } }); computer.execute(); }