B4J Question BytesToString Charset

[MarrowZero]

Hello all,

Where do I find the valid CharSet parameters values? If I use "utf8" it works, but if I try "ANSI" it does not work.

Log(BytesToString(b, 16508,32, "utf8"))

Log(BytesToString(b, 16508,32, "ANSI"))

Error occurred on line: 37 (B4XMainPage)
java.io.UnsupportedEncodingException: ANSI
    at java.base/java.lang.StringCoding.decode(StringCoding.java:243)
    at java.base/java.lang.String.<init>(String.java:467)
    at anywheresoftware.b4a.keywords.Common.BytesToString(Common.java:609)
    at b4j.example.b4xmainpage._button2_click(b4xmainpage.java:87)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:632)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:234)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:108)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:98)
    at anywheresoftware.b4a.BA$1.run(BA.java:233)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
    at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
    at java.base/java.lang.Thread.run(Thread.java:834)

B4J v9.00

Thanks
--Paul

 

[MarrowZero]

I'd like to feedback that if the CharSet value is missing, you'll get a compile error. Its not clear to me that the CharSet parameter is required (maybe again I miss something about documentation/expectations, I am new to B4X world, please correct me)

Error compiling program.
Error description: ',' expected.

Also, if the CharSet value is an empty string, the code will complile but then gives a runtime error

Log(BytesToString(b, 16508,32,""))


==============
Error occurred on line: 30 (B4XMainPage)
java.io.UnsupportedEncodingException:
    at java.base/java.lang.StringCoding.decode(StringCoding.java:243)
    at java.base/java.lang.String.<init>(String.java:467)
    at anywheresoftware.b4a.keywords.Common.BytesToString(Common.java:609)
    at b4j.example.b4xmainpage._button1_click(b4xmainpage.java:72)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:632)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:234)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:108)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:98)
    at anywheresoftware.b4a.BA$1.run(BA.java:233)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
    at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
    at java.base/java.lang.Thread.run(Thread.java:834)

 

[DaleA]

I don't think ANSI is a valid encoding designation. You might want to check out the following thread:

Encoding Detector

 

[Erel]

I'd like to feedback that if the CharSet value is missing, you'll get a compile error. Its not clear to me that the CharSet parameter is required

Unless written otherwise, all parameters are required.

There is no such encoding named ANSI. Maybe you are looking for "ASCII".

 

[MarrowZero]

Yep, 'ASCII' works and thanks for the link to that thread about Encoding. However, how can I find the true defined list of acceptable values of CharSet ?

For example, UTF8 vs utf-8, US-ASCII vs ASCII vs WINDOWS-1252
Does case matter?
I would prefer not to guess, just be told what the value are in black and white.

 

[Erel]

Case doesn't matter. UTF8, UTF-8, ASCII and WINDOWS-1252 will work on all devices.

You can use this code to find all available charsets, this list can vary:

Sub GetCharsets As List
    Dim Charset As JavaObject
    Dim map As JavaObject = Charset.InitializeStatic("java.nio.charset.Charset").RunMethod("availableCharsets", Null)
    Dim o() As Object = map.RunMethodJO("keySet", Null).RunMethod("toArray", Null)
    Return o
End Sub

Don't use it unless you are doing something very special.

 

[MarrowZero]

Thanks Erel, thats the sort of answer I was looking for