令牌上的语法错误＆＃34; getInstance＆＃34;，此令牌后预期的标识符

Question

private class CrashWatcher implements UiWatcher {
    public boolean checkForCondition() {
        UiObject crashButton = new UiObject(
                new UiSelector().textStartsWith("Unfortunately,"));
        if (crashButton.exists()) {
            log("Found the OK dialog");
            UiObject okButton = new UiObject(new UiSelector().className(
                    "android.widget.Button").text("OK"));
            try {
                okButton.click();
            } catch (UiObjectNotFoundException e) {
                log("The chance of not having 'OK' button when the application crash is extremely less.");
                return false;
            }
        }
        return true;
    }
};

此行有多个标记      - 令牌上的语法错误＆＃34;。＆＃34;，{预期      - 令牌上的语法错误＆＃34; getInstance＆＃34;，此令牌后预期的标识符

UiDevice.getInstance().registerWatcher(CRASH_WATCHER_NAME, new UiWatcher());