哪位大佬能解答一下这个问题吗
publicclassTest {
publicstaticvoidmain(String[] args) {
StringBuffer a = newStringBuffer("A");
StringBuffer b = newStringBuffer("B");
operator(a, b);
System.out.println(a + ","+ b);
}
publicstaticvoidoperator(StringBuffer x, StringBuffer y) {
x.append(y); y = x;
}
}
//哪位大佬能解释一下这个结果吗