public static void main(String[] args) {

    String bear1 = "?";
    String multiple = "\uD83D\uDC5A\uD83D\uDC5B\uD83D\uDC5C\uD83D\uDC55\uD83D\uDC5C\uD83D\uDC59\uD83D\uDC5E\uD83D\uDC61\uD83E\uDD84\uD83E\uDD93\uD83E\uDD84\uD83D\uDC34";
    String bear2 = "\ud83d\udc3b";
    String alien = "\uD83D\uDC7D";

    System.out.println("bear 1: " + bear1+ " multiple:" + multiple + " bear2: " + bear2 + " alien: " + alien);

    byte[] bear1B = bear1.getBytes();
    byte[] multipleB = multiple.getBytes();
    byte[] bear2B = bear2.getBytes();
    byte[] alienB = alien.getBytes();

    System.out.println("bear1B: " + Arrays.toString(bear1B));
    System.out.println("multiple: " + Arrays.toString(multipleB));
    System.out.println("bear2B : " + Arrays.toString(bear2B));
    System.out.println("alienB : " + Arrays.toString(alienB));

}

输出：

bear 1: ? multiple:????????????? bear2: ? alien: ?
bear1B: [63]
multiple: [63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63]
bear2B : [63]
alienB : [63]

这看起来不像是控制台的失败，因为字节都是63，尽管它们是“multiple”变量中的不同符号。我不知道我是否做错了什么，但似乎java将所有表情符号解释为一个值（63）。