Something

public class IfConsideredHarmful {
	public void aMethod(boolean condition, Object parameter) {
		this.getClass().getMethod("aMethod_" + condition, new Class[] { Object.class }).invoke(this, parameter);
	}

	private void aMethod_true(Object parameter)  {
		// if (condition) {
	}

	private void aMethod_false(Object parameter)  {
		// } else {
	}
}