This is kinda of a Noobie what about I am gonna ask but I am trying to get my Program to work I do not know how to Ask a question in a text box hit the button and it outputs the answer; I Have been researching this for a while I know how to get everything else to work.
So a simple Console app example:
static void Main()
{
bool exit = false;
string response;
while (!exit)
{
Console.Write("Command ('Exit' to end): ");
response = Console.ReadLine();
switch (response)
{
case "Hey":
Console.WriteLine("Welcome");
break;
case "unicorns":
Console.WriteLine("...are awesome!");
break;
case "Exit":
exit = true;
break;
default:
Console.WriteLine("Unrecognized command!");
break;
}
}
Console.Write("Press Enter to Quit");
Console.ReadLine();
}
Related
I am writing some tests for a Java method which contains a switch statements but it seems that the "default statement" does not work. I only accept: Yes, No, Maybe. Everything else should return Maybe. My test always return the user input, does not matter what the user typed, so I guess my switch statement is not correct.
I have tried to move the default statement on the top
#Override
public String choice(String ans) {
getChoice = ans;
switch (ans) {
case "Yes":
break;
case "No":
break;
default:
getChoice = "Maybe";
}
return getChoice;
}
Thank you!
Your switch should work... As Kyle tells you "what are you overriding ?"
But why a switch when you can perform an "if then else" ?
Public String choice (String choice) {
If (choice.equals("yes") || choice.equals("no") {
return choice;
else {
return "maybe";
}
}
Switch is fine for multiple choices
When I run this part of my program, it fails to recognize the two input statements using 'sc.nextLine();', but it accepts an entry for 'sc.next();'. Does anyone have any suggestions?
String information()
{
int l;char at;String nam,id,number;long contact;
System.out.println("\nPlease enter your name");
nam=sc.nextLine();
do
{
System.out.println("\nPlease enter your contact number");
contact=sc.nextLong();
number=Long.toString(contact);
l=number.length();
if(l<5||l>8&&l!=10)
error();
}
while(l<5||l>8&&l!=10);
System.out.println("\nPlease enter your e-mail id");
id=sc.nextLine();
int len=id.length();
for(int k=0;k<len;k++)
{
at=id.charAt(k);
if(Character.isWhitespace(at))
{
error();
break;
}
}
return nam;
}
Try sc.nextLine above the
nam = sc.nextLine();
It takes nextLine into an empty line so you need to clear the buffer first.
I am trying to modify comment body before saving or updating in drupal 6. I am trying to use following code:
function mymodule_comment(&$a1, $op) {
switch ($op) {
case 'insert':
case 'update':
$a1['comment'] = myfunction($a1['comment']);
break;
}
}
But it is not updating the comment body after save. I also tried following code and it works:
function mymodule_comment(&$a1, $op) {
switch ($op) {
case 'insert':
$a1['comment'] = myfunction($a1['comment']);
comment_save($a1);
break;
}
}
But in case of update it is showing error:
function mymodule_comment(&$a1, $op) {
switch ($op) {
case 'update':
$a1['comment'] = myfunction($a1['comment']);
comment_save($a1);
break;
}
}
Any idea or help is very appreciated.
Ok I got the work around. first create a hook_form_alter function:
mymodule_form_alter($form,$form_state,$form_id){
if ($form_id == 'comment_form') {
$form['#submit'][] = 'mymodule_comment_form_submit';
}
}
Then create hook_comment_form_submit function and do your modification:
mymodule_comment_form_submit($form, $form_state){
$form_state['values']['comment'] = myfunciton($form_state['values']);
comment_save($form_state['values']);
}
I dont know whether it is a good idea or not but I found few of post in which this approach is used.
Debugging bit of code for bluetooth connection receive string etc. However, seem to be getting a ClassCastException at the line of code
String read_Message = (String) msg.obj;
But if I was to use my previous bit of code and collect the bytes and place into a string runs but doesn't collect all the data in one string.
Have I not cast something or missed something cause I know I'm missing something but can't see it.
If any more code is required I will place up, everything else is working
Thanks for any help
// The Handler that gets information back from the BluetoothService
private final Handler mHandler = new Handler() {
#Override
public void handleMessage(Message msg)
{
switch (msg.what)
{
case MESSAGE_STATE_CHANGE:
// if (D) Log.i(TAG, "MESSAGE_STATE_CHANGE: " + msg.arg1);
switch (msg.arg1)
{
case BluetoothService.STATE_CONNECTED:
break;
case BluetoothService.STATE_CONNECTING:
//mTitle.setText(R.string.title_connecting);
break;
case BluetoothService.STATE_LISTEN:
case BluetoothService.STATE_NONE:
//mTitle.setText(R.string.title_not_connected);
break;
}
break;
case MESSAGE_WRITE:
//code to be entered here
break;
case MESSAGE_READ:
//Previous code
//byte[] read_Buf = (byte[]) msg.obj;
// construct a string from the valid bytes in the buffer
//String read_Message = new String(read_Buf, 0, msg.arg1);
String read_Message = (String) msg.obj;
if (mSmokeReadingArrayAdapter.isEmpty())
mSmokeReadingArrayAdapter.add("");
mAdapter_Text.set(0, mAdapter_Text.get(0).toString() + read_Message);
mSmokeReadingArrayAdapter.notifyDataSetChanged();
organiseString(read_Message);
break;
case MESSAGE_DEVICE_NAME:
//code to be entered here
break;
case MESSAGE_TOAST:
Toast.makeText(getApplicationContext(), msg.getData().getString(TOAST), Toast.LENGTH_SHORT).show(); // shows 'alert' messages
break;
}
}
};
Problem solved. It wa to do with the bluetooth service code that had been defined as a byte array rather than string
I'm using EMDK 2.5 (VS2008 and VC# and .NetCF3.5) Barcode2 class from the library to write a sample application to scan bar codes. I followed the samples available in EMDK namely CS_Barcode2Sample1 project.Every time I hardware trigger the scan the notification "E_SCN_READINCOMPATIBLE" is thrown and not able to retrieve the scanned data. The documentation doesn't say much about the cause of E_SCN_READINCOMPATIBLE notification and no luck from Google search. I tried several options including making use of Symbol.Barcode and the outcome is same.
I also tried EMDK 2.3 but the result is same.
I've pasted the whole code here....
public partial class Form1 : Form
{
private Barcode2 myBarcode2 = null;
public Form1()
{
InitializeComponent();
InitBarcode();
}
public bool InitBarcode()
{
// If the Barcode2 object is already initialized then fail the initialization.
if (myBarcode2 != null)
{
return false;
}
else // Else initialize the reader.
{
try
{
Symbol.Barcode2.Device[] AvailableDevices = Symbol.Barcode2.Devices.SupportedDevices;
if (AvailableDevices.Length == 0)
{
return false;
}
if (AvailableDevices.Length == 1)
{
//get the first available scanner in the list
Symbol.Barcode2.Device MyDevice = AvailableDevices[0];
// Create the reader, based on selected device.
myBarcode2 = new Barcode2(MyDevice);
// Attach a scan notification handler.
//this.myScanNotifyHandler = new Barcode2.OnScanHandler(myBarcode2_ScanNotify);
myBarcode2.OnScan += myBarcode2_ScanNotify;
// Attach a status notification handler.
//this.myStatusNotifyHandler = new Barcode2.OnStatusHandler(myBarcode2_StatusNotify);
myBarcode2.OnStatus += myBarcode2_StatusNotify;
myBarcode2.Config.TriggerMode = TRIGGERMODES.HARD;
// Submit a scan.
myBarcode2.Scan(5000);
}
}
catch (OperationFailureException ex)
{
MessageBox.Show("Exception Raised 1");
return false;
}
catch (InvalidRequestException ex)
{
MessageBox.Show("Exception Raised 2");
return false;
}
catch (InvalidIndexerException ex)
{
MessageBox.Show("Exception Raised 3");
return false;
}
}
return false;
}
private void myBarcode2_ScanNotify(ScanDataCollection scanDataCollection)
{
// Checks if the BeginInvoke method is required because the OnScan delegate is called by a different thread
if (this.InvokeRequired)
{
// Executes the OnScan delegate asynchronously on the main thread
this.BeginInvoke(new Barcode2.OnScanHandler(myBarcode2_ScanNotify), new object[] { scanDataCollection });
}
else
{
// Get ScanData
ScanData scanData = scanDataCollection.GetFirst;
int i;
switch (scanData.Result)
{
case Symbol.Barcode2.Results.SUCCESS:
String str = scanData.Text;
myBarcode2.Config.TriggerMode = TRIGGERMODES.HARD;
myBarcode2.Scan(5000);
break;
case Symbol.Barcode2.Results.E_SCN_READTIMEOUT:
break;
case Symbol.Barcode2.Results.CANCELED:
break;
case Symbol.Barcode2.Results.E_SCN_DEVICEFAILURE:
i = 93;
break;
default:
if (scanData.Result == Symbol.Barcode2.Results.E_SCN_READINCOMPATIBLE)
{
// If the failure is E_SCN_READINCOMPATIBLE, exit the application.
MessageBox.Show("Fatal Error");
this.Close();
return;
}
break;
}
}
}
private void myBarcode2_StatusNotify(StatusData statusData)
{
// Checks if the Invoke method is required because the OnStatus delegate is called by a different thread
if (this.InvokeRequired)
{
// Executes the OnStatus delegate on the main thread
this.Invoke(new Barcode2.OnStatusHandler(myBarcode2_StatusNotify), new object[] { statusData });
}
else
{
int i;
switch (statusData.State)
{
case States.IDLE:
break;
case States.READY:
break;
default:
break;
}
}
}
}
}
I've went thru this recently also, as I observed, it probably due to the scanner device is occupied by other application, where the scan request has been queued already, you can go to memory management, and kill the suspect app, and try your app again.
Refer to the Symbol FAQ