编译并执行下面的程序时，会输出什么结果。符号"? "表示空格。(     )

public class Base{
    private void test() {
        String aStr = "?One?";
        String bStr = aStr;
        aStr.toUpperCase();
        aStr.trim();
        System.out.println("[" + aStr + "," + bStr + "]");
    }
    static public void main(String[] a) {
        new Base().test();
    }
}