首先,我已经研究了Null指针的含义,我已经阅读了下面的内容,但我仍然完全迷失了方向。
我的错误是
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at EBIAlarmUI$2.alarm1ButtonActionPerformed(EBIAlarmUI.java:113)
at EBIAlarmUI$2.actionPerformed(EBIAlarmUI.java:109)
这就是导致它的代码。
alarm1Button = new JButton();
alarm1Bu
我对这个drools团队完全是新手。因此,我在这里遇到了一点麻烦。
rule "Raise the alarm when we have one or more fires"
when
exists Fire()
then
insert( new Alarm() );
end
当我有这段代码时,它工作得很好。但我想将其更改为:
rule "Raise the alarm when we have one or more fires"
when
exists Fire()
then
$alarm = new Alarm();
我正在尝试在我创建的某个模型类中测试我的包实现,带有模拟的依赖关系。但是,每次我使用模拟依赖项初始化它,然后将其写入和读取到包中时,我都会收到类警报的Class not found when unmarshalling: Interval_Proxy异常,以及模拟依赖项间隔。
问题可能是,在我的包读取实现中,我在读取特定依赖项时使用了Interval类加载器,尽管模拟将其转换为Interval_Proxy类型,但我真的不知道。
有没有人能解释一下这个?
我的测试:
UUID id = UUID.fromString("feb33f17-8512-4416-b376-84fd0bb603
我要把我的应用程序连接到蓝牙串行连接上。我想将数据( String )更改为Integer,以便进行比较。
在阅读邮件时是这样的:
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
// construct a string from the valid bytes in the buffer
String readMessage = new String(readBuf, 0, msg.arg1);
Log.i(LOG_TAG, readMessage);
mTe
Oreo8.0(Api 26)和以下的通知都很好,但是它们没有使用Oreo8.1.0。
下面是错误的堆栈跟踪
android.app.RemoteServiceException: Bad notification for startForeground: java.lang.RuntimeException: invalid channel for service notification: Notification(channel=null pri=0 contentView=null vibrate=null sound=null defaults=0x0 flags=0x40 col
我尝试使用以下代码将多个项添加到我的arraylist中:
public static ArrayList<HashMap<String, String>> alarmClocks = new ArrayList<>();
public void q1() {
int[] multipleHours = {9, 11, 13, 14, 15, 17, 18}; //store here the hours for every alarm you want to set
int[] multipleM
我目前正在尝试使用java在我进入程序的特定时间打开我的默认web浏览器来观看YouTube视频(发出各种警报)。
下面是我的代码:
import java.awt.Desktop;
import java.net.URI;
import java.net.URISyntaxException;
import java.io.IOException;
public class YtAlarm
{
int hr;
int min;
public YtAlarm(int hours, int minutes) //constructor
{
h
NavArgs不返回值,当我试图通过update片段中的setOnClickListener进行更新时,就会得到这样的结果:
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
Caused by: java.lang.IllegalArgumentException: Required argument "currentAlarm" is missing and does not have an android:defaultValue
我需要从RecyclerView中选择的警
在成功地从Corba U2000服务器获取警报并读取这些值之后,我将得到以下错误
ERROR: org.omg.CORBA.MARSHAL: Sequence length too large. Only 12 available and trying to assign 31926513 vmcid: 0x0 minor code: 0 completed: No
org.omg.CORBA.MARSHAL: Sequence length too large. Only 12 available and trying to assign 31926513 vmcid: 0x0 m
我知道已经有人问过同样的问题,但它们对我没有帮助。我有两个致命的错误。
错误1
Unable to locate adb
java.lang.IllegalArgumentException: Unable to locate adb
at com.android.tools.idea.run.editor.DeployTargetPickerDialog.<init>(DeployTargetPickerDialog.java:137)
at com.android.tools.idea.run.editor.ShowChooserTargetProvider.showPro
变得陈旧:尝试连接数据库时出现关闭连接错误。
[5/13/21 8:24:30:442 CDT] 00000583 ThreadMonitor W WSVR0606W: Thread "ORB.thread.pool : 0" (00000583) was previously reported to be hung but has completed. It was active for approximately 900827 milliseconds. There is/are 0 thread(s) in total in the server that sti
当我尝试播放我的应用程序时,它显示Unable to locate adb here是错误日志Unable to locate adb java.lang.IllegalArgumentException: unable to locate adb at com.android.tools.idea.run.editor.ShowChooserTargetProvider.showPrompt(ShowChooserTargetProvider.java:97) at com.android.tools.idea.run.AndroidRunConfigurationBase.getDeplo
我正忙着闹钟,我得到了一个pendingIntent,它应该能让闹钟打瞌睡。在活动中,同样的代码工作得很好。我改变了一些东西,现在换了一个不同的班。我得到了一个nullpointerExecption。(承包商从活动中获取上下文。
打盹功能:
public void settingNewIntentForSnooze() {
PendingIntent alarmPendingIntent=null;
Calendar calendar = Calendar.getInstance();
// new alarm after the snooze.
calend
我收到了来自GCM的消息,但我得到的是字符串而不是布尔值。似乎问题出在我的JSON数组上。我收到警告消息:
04-17 00:41:04.058: W/Bundle(6702): Key alarm expected Boolean but value was a java.lang.String. The default value false was returned.
04-17 00:41:04.058: W/Bundle(6702): Attempt to cast generated internal exception:
04-17 00:41:04.058: W/Bundle