java - 测试十六进制值

Question

我想捕获这个异常，并且我想在 catch block 中进行一些处理，这是代码:

  try {
root.setText(page.getText(field.getLine() + repetition,
                          field.getColumn(),
                          field.getLength()));
  } catch (org.jdom2.IllegalDataException e) {
// ignore: some lines can be empty and cannot
// be a valid XML character so we skip them

String invalidStr = page.getText(field.getLine() + repetition, field.getColumn(),field.getLength());

  }

这是我使用 e.printStackTrace() 时打印的错误；方法:

org.jdom2.IllegalDataException: The data "
                                      " is not legal for a JDOM character content: 0x000c is not a legal XML character.
at org.jdom2.Text.setText(Text.java:182)

那么如何测试字符0x000c的值:

    String invalidStr = page.getText(field.getLine() + repetition, field.getColumn(),field.getLength());
    if (invalidStr.equals(???)) {
    }

提前谢谢

Answer 1

if (invalidStr.indexOf(0x000C) >= 0) ...

或者

if (invalidStr.indexOf('\u000C') >= 0) ...

或者

if (invalidStr.contains("\u000C")) ...

(使用Unicode escape)