Error in converting double to double array
Iam getting a problem while coverting the values of a table to double array local variable . while the values r getting from the resultset using while(rs.next())
all the values have to store in the double array.please give me solution to this problem.
Show us your code and the problem you are facing.
Similar Messages
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Why dont we get a compilation error for converting a collection into array?
Why don't we get a compilation error but get a runtime error while explicit casting of Object[] into a String[]?
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
public class SampleMap {
public static void main(String[] args) {
Map<Integer, String> temp = new HashMap<Integer, String>();
temp.put(new Integer(1), "cat");
temp.put(new Integer(2), "rat");
Collection coll = temp.values();
String[] arr = (String[]) coll.toArray();
System.out.println(arr.length);
} Thanks,
Harish SrinivasanInfiniti wrote:
Why don't we get a compilation error but get a runtime error while explicit casting of Object[] into a String[]?
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
public class SampleMap {
public static void main(String[] args) {
Map<Integer, String> temp = new HashMap<Integer, String>();
temp.put(new Integer(1), "cat");
temp.put(new Integer(2), "rat");
Collection coll = temp.values();
String[] arr = (String[]) coll.toArray();
System.out.println(arr.length);
} Thanks,
Harish SrinivasanAn explicit cast's job is to tell the compiler that even though it cannot guarantee that the conversion will work, allow the code anyway and let the runtime handle an error if it occurs. -
How to convert BigDecimal to double
Error Message: {http://xmlns.oracle.com/OracleRules1/OracleRules1_DecisionService_1}operationErroredFault
Fault ID default/BusinessRule2!1.0*b48a0c26-0b59-41e0-8939-55c7589d76f1/BusinessRule2_BPELProcess/10004-BpInv0-BpSeq2.9-4
Fault Time Jan 15, 2010 11:52:33 AM
Non Recoverable System Fault :
<bpelFault><faultType> <message>0</message></faultType><operationErroredFault xmlns="http://xmlns.oracle.com/OracleRules1/OracleRules1_DecisionService_1"><part name="payload"><errorInfo xmlns="http://xmlns.oracle.com/OracleRules1/OracleRules1_DecisionService_1"><errorMessage>cannot convert from type 'java.math.BigDecimal' to type 'double' at line 5 column 9 in main</errorMessage></errorInfo></part></operationErroredFault></bpelFault>
> how to convert bigdecimal to double in webdynpro java
Hi,
Try this:
double x = wdContext.currentContextElement().getBigdecimalAttribute().doubleValue();
Refer methods applicable on Bigdecimal here -
http://code.google.com/android/reference/java/math/BigDecimal.html
Regards,
Anagha
Edited by: Anagha Jawalekar on Nov 17, 2008 12:08 PM -
Cannot explicit convert double.MaxValue/double.MinValue/float.MaxValue/float.MinValue to decimal
I'm try set double.MaxValue/double.MinValue/float.MaxValue/float.MinValue to NumericUpDown's Maximun/Minimum
It fail (compile error)
but variable and constant's explicit conversion is OK.
can anyone tell me why?
the screenshot is in below
http://i.imgur.com/woZXr0i.pngyes, your right!
I has been tried
If I assign it(MinValue/MaxValue) to a variable first and then explicit convert to a decimal
it will be pass compile, but it will throw exception when runtime
screenshot
http://i.imgur.com/TpD8guJ.png -
Convert String to double with two digits
How can I format "String" type of numbers (eg. 199.0, or 199) to return a "double" type of nubmers like 199.00, or 199.00. It should have two digits.
For example, the input is String of 199.0, how can I get "double" 199.00. Always format as two digits.
Thanks for your help,Thanks for replying.
Here is my code. For some reason, when convert the returned String back to double in main, it cut the "0".
What's wrong with my code? How can I get that 4.60 in double type.
Thanks again,
==================================================================================
import java.text.*;
import java.util.*;
import java.sql.*;
public class NumUtils
// Convert Double to 99.99
public static String format(String str)
//double d = 4.6;
double d = Double.parseDouble(str);
NumberFormat formatter = new DecimalFormat("0.00");
formatter.setMaximumFractionDigits(2);
String s = formatter.format(d);
return s;
public static void main(String[] args)
String myDouble = "4.6";
String mynewdouble = format(myDouble);
System.out.println(" --- formatDouble = " + mynewdouble);
double my_d = Double.parseDouble(mynewdouble);
System.out.println(" --- Double = " + my_d); -
How can I convert Double to double???
It's an extremely important skill to learn to read the API and become familiar with the tools you will use to program Java. Java has an extensive set of documentation that you can even download for your convenience. These "javadocs" are indexed and categorized so you can quickly look up any class or method. Take the time to consult this resource whenever you have a question - you'll find they typically contain very detailed descriptions and possibly some code examples.
Java� API Specifications
Java� 1.5 JDK Javadocs -
Converting object wrapper type array into equivalent primary type array
Hi All!
My question is how to convert object wrapper type array into equivalent prime type array, e.g. Integer[] -> int[] or Float[] -> float[] etc.
Is sound like a trivial task however the problem is that I do not know the type I work with. To understand what I mean, please read the following code -
//Method signature
Object createArray( Class clazz, String value ) throws Exception;
//and usage should be as follows:
Object arr = createArray( Integer.class, "2%%3%%4" );
//"arr" will be passed as a parameter of a method again via reflection
public void compute( Object... args ) {
a = (int[])args[0];
//or
Object arr = createArray( Double.class, "2%%3%%4" );
public void compute( Object... args ) {
b = (double[])args[0];
//and the method implementation -
Object createArray( Class clazz, String value ) throws Exception {
String[] split = value.split( "%%" );
//create array, e.g. Integer[] or Double[] etc.
Object[] o = (Object[])Array.newInstance( clazz, split.length );
//fill the array with parsed values, on parse error exception will be thrown
for (int i = 0; i < split.length; i++) {
Method meth = clazz.getMethod( "valueOf", new Class[]{ String.class });
o[i] = meth.invoke( null, new Object[]{ split[i] });
//here convert Object[] to Object of type int[] or double[] etc...
/* and return that object*/
//NB!!! I want to avoid the following code:
if( o instanceof Integer[] ) {
int[] ar = new int[o.length];
for (int i = 0; i < o.length; i++) {
ar[i] = (Integer)o;
return ar;
} else if( o instanceof Double[] ) {
//...repeat "else if" for all primary types... :(
return null;
Unfortunately I was unable to find any useful method in Java API (I work with 1.5).
Did I make myself clear? :)
Thanks in advance,
Pavel GrigorenkoI think I've found the answer myself ;-)
Never thought I could use something like int.class or double.class,
so the next statement holds int[] q = (int[])Array.newInstance( int.class, 2 );
and the easy solution is the following -
Object primeArray = Array.newInstance( token.getPrimeClass(), split.length );
for (int j = 0; j < split.length; j++) {
Method meth = clazz.getMethod( "valueOf", new Class[]{ String.class });
Object val = meth.invoke( null, new Object[]{ split[j] });
Array.set( primeArray, j, val );
}where "token.getPrimeClass()" return appropriate Class, i.e. int.class, float.class etc. -
How can i convert object to byte array very*100 fast?
i need to transfer a object by datagram packet in embeded system.
i make a code fallowing sequence.
1) convert object to byte array ( i append object attribute to byte[] sequencailly )
2) send the byte array by datagram packet ( by JNI )
but, it's not satisfied my requirement.
it must be finished in 1ms.
but, converting is spending 2ms.
network speed is not bottleneck. ( transfer time is 0.3ms and packet size is 4096 bytes )
Using ObjectOutputStream is very slow, so i'm using this way.
is there antoher way? or how can i improve?
Edited by: JongpilKim on May 17, 2009 10:48 PM
Edited by: JongpilKim on May 17, 2009 10:51 PM
Edited by: JongpilKim on May 17, 2009 10:53 PMthanks a lot for your reply.
now, i use udp socket for communication, but, i must use hardware pci communication later.
so, i wrap the communication logic to use jni.
for convert a object to byte array,
i used ObjectInputStream before, but it was so slow.
so, i change the implementation to use byte array directly, like ByteBuffer.
ex)
public class ByteArrayHelper {
private byte[] buf = new byte[1024];
int idx = 0;
public void putInt(int val){
buf[idx++] = (byte)(val & 0xff);
buf[idx++] = (byte)((val>>8) & 0xff);
buf[idx++] = (byte)((val>>16) & 0xff);
buf[idx++] = (byte)((val>>24) & 0xff);
public void putDouble(double val){ .... }
public void putFloat(float val){ ... }
public byte[] toByteArray(){ return this.buf; }
public class PacketData {
priavte int a;
private int b;
public byte[] getByteArray(){
ByteArrayHelper helper = new ByteArrayHelper();
helper.putInt(a);
helper.putInt(b);
return helper.toByteArray();
but, it's not enough.
is there another way to send a object data?
in java language, i can't access memory directly.
in c language, if i use struct, i can send struct data to copy memory by socket and it's very fast.
Edited by: JongpilKim on May 18, 2009 5:26 PM -
Which is better in performance Double + "" or Double.toString() ?
Can anyone let me know which of these will be performance effective for converting a Double to String:
1. Double + ""
2. Double.toString() ?ejp wrote:
Double+"" calls String.valueOf(double) and then appends "" so it can't possibly be faster.Actually the append/+ uses a StringBuilder which costs almost a micro-second more. (Actually its about 0.3 us on my machine)
Both methods call Double.toString(double) which is what I would use except ""+d is faster to type. ;)
Edited by: Peter__Lawrey on 25-Jul-2009 07:57 -
Invalid operands to binary ^ (have 'double' and 'double')
Hi all,
I've been trying to make some calculus like
double a, b, c;
b = 0.3;
c =0.35;
a = b^c;
but I get this error message: *"Invalid operands to binary ^ (have 'double' and 'double')"*. Does anybody know how to solve this?
Thanks in advance!Yes I think Ray hit the nail on the head. It looks as if you wanted to perform and exponentiation operation, not a bitwise operation. So, just to expand on Ray's answer a bit, the carrot symbol (^) that you used in your statement is, in C, the bitwise XOR operator, and has nothing to do with exponentiation. There are numerous bitwise operators in C (bitwise AND (&), bitwise OR (|), bitwise XOR (^)), and they all deal with manipulating bits of data. If you were, in fact, trying to raising b to the power of c and assign that value back to a, then Ray's post was the perfect answer as to how to do that.
Many programmers that are new to C, especially ones coming from a language such as Visual Basic, where the carrot symbol is used for exponentiation operations, naturally try to use the same symbol for the same purpose in C, and are surprised to find that it doesn't do what they expected (understandably). As mentioned, this is because, in C, there is no exponentiation operator, and the carrot symbol does something completely different and unrelated to exponentiation. However, C does provide a predefined function in its standard library for exponentiation, and it is called the pow() function, which takes two double-typed arguments (the first is the number being risen and the second is the power that it is being raised to), and returns the result as a double. To use this function, all you have to do is write an include directive at the top of the file that you will be using the function in that tells the preprocessor to include the file math.h. See RayNewb's post for a solid example of how all this stuff would look in your source code, and, as he mentioned, open your Terminal and type in +man math+ or, for this particular function, +man pow+ to find out more about how this function works (you can page through the information with the spacebar or scroll down with the down arrow).
Hope this was of some help for you, and best of luck with everything! -
Error while converting class file to exp and jca file
error while converting *.class file to *.exp and *.jca file
=====================================================================================================================
linux-y60u:/home/admin/java_card_kit-2_2_1/samples/src # converter -exportpath "/home/admin/java_card_kit-2_2_1/lib/" com/sun/javacard/samples/HelloWorld 0x00:0x01:0x02:0x03:0x04:0x05:0x06:0x07:0x0b 1.0 -v -applet 0x00:0x01:0x02:0x03:0x04:0x05:0x06:0x07:0x0b:0x01 Identity
Java Card 2.2.1 Class File Converter, Version 1.3
Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
parsing /home/admin/java_card_kit-2_2_1/samples/src/com/sun/javacard/samples/HelloWorld/HelloWorld.class
parsing /home/admin/java_card_kit-2_2_1/samples/src/com/sun/javacard/samples/HelloWorld/Identity.class
error: com.sun.javacard.samples.HelloWorld.HelloWorld: unsupported class file format of version 50.0.
error: com.sun.javacard.samples.HelloWorld.Identity: unsupported class file format of version 50.0.
conversion completed with 2 errors and 0 warnings.
=====================================================================================================================i compile a file javacard use this command:
===
javac -source 1.3 -target 1.1 -g -classpath ./classes:../lib/api.jar:../lib/installer.jar src/com/sun/javacard/samples/Identity/Identity.java
===
and try to convert this class use this command
===
/home/xnuxerx/admin/java_card_kit-2_2_1/bin/converter -exportpath "/home/xnuxerx/admin/java_card_kit-2_2_1/lib/" com/sun/javacard/samples/Identity 0x00:0x01:0x02:0x03:0x04:0x05:0x06:0x07:0x0b 1.0 -v -applet 0x00:0x01:0x02:0x03:0x04:0x05:0x06:0x07:0x0b:0x01 Identity
===
result convert:
===
Java Card 2.2.1 Class File Converter, Version 1.3
Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
parsing /home/xnuxerx/admin/java_card_kit-2_2_1/samples/classes/com/sun/javacard/samples/Identity/Identity.class
converting com.sun.javacard.samples.Identity.Identity
error: export file framework.exp of package javacard.framework not found.
conversion completed with 1 errors and 0 warnings.
===
why ??
please your comment for this problem.
thank 4 all. -
Gettin error Cannot convert to number in RTF Template
Hi,
I am working on xml template development i am getting the followinf error
Font Dir: C:\Program Files\Oracle\XML Publisher Desktop\Template Builder for Word\fonts
Run XDO Start
RTFProcessor setLocale: en-us
FOProcessor setData: D:\Tickets\Remittance Advice XMLP\canada_report1.xml
FOProcessor setLocale: en-us
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at oracle.apps.xdo.common.xml.XSLT10gR1.invokeProcessXSL(XSLT10gR1.java:586)
at oracle.apps.xdo.common.xml.XSLT10gR1.transform(XSLT10gR1.java:383)
at oracle.apps.xdo.common.xml.XSLT10gR1.transform(XSLT10gR1.java:201)
at oracle.apps.xdo.common.xml.XSLTWrapper.transform(XSLTWrapper.java:161)
at oracle.apps.xdo.template.fo.util.FOUtility.generateFO(FOUtility.java:1015)
at oracle.apps.xdo.template.fo.util.FOUtility.generateFO(FOUtility.java:968)
at oracle.apps.xdo.template.fo.util.FOUtility.generateFO(FOUtility.java:209)
at oracle.apps.xdo.template.FOProcessor.createFO(FOProcessor.java:1561)
at oracle.apps.xdo.template.FOProcessor.generate(FOProcessor.java:951)
at RTF2PDF.runRTFto(RTF2PDF.java:626)
at RTF2PDF.runXDO(RTF2PDF.java:460)
at RTF2PDF.main(RTF2PDF.java:251)
Caused by: oracle.xdo.parser.v2.XPathException: Cannot convert to number.
at oracle.xdo.parser.v2.XSLStylesheet.flushErrors(XSLStylesheet.java:1526)
at oracle.xdo.parser.v2.XSLStylesheet.execute(XSLStylesheet.java:517)
at oracle.xdo.parser.v2.XSLStylesheet.execute(XSLStylesheet.java:485)
at oracle.xdo.parser.v2.XSLProcessor.processXSL(XSLProcessor.java:264)
at oracle.xdo.parser.v2.XSLProcessor.processXSL(XSLProcessor.java:150)
at oracle.xdo.parser.v2.XSLProcessor.processXSL(XSLProcessor.java:187)
... 16 more
I have checked the code and problem was due to following code i dont know where i went wrong
<xsl:variable xdofo:ctx="incontext" name="inner_group" select=".//G_SEL_INV_DATA"/><?for-each:$inner_group?><?if:(position()-1) mod $no_of_lines_per_page=0?><xsl:variable name="first_rec" xdofo:ctx="incontext" select="position()"/>
Please help me to solve this issue...
Thanks
RajeshWhat was the problem in the template? I am facing the same error, when I put a conditional in the data field, it throws the XML-22036: (Error) Cannot convert to number.
error, where if the element was printed directly it works fine.
error
<Line 984, Column 130>: XML-22036: (Error) Cannot convert to number.
@Line 984 ==> <xsl:variable name="v148" select="format-number(string(xdoxslt:one($v147)), string('###0.00'), string('_DECIMALFORMAT'))"/>
End of Process.
<format>
Number, ###0.00
<DATA >BROKEN
If (to_number(../DocumentPayableCount) + to_number(Extend/NumberOfPO) + sum(to_number(../DocumentPayable/Extend/Commentlength))) <= 7 then Extend/InvoiceAmount end if
<DATA >ALSO BROKEN
If (../DocumentPayableCount + Extend/NumberOfPO + sum(../DocumentPayable/Extend/Commentlength)) <= 7 then Extend/InvoiceAmount end if
<DATA> WORKS
then Extend/InvoiceAmount -
RFC Function Error: Cannot convert a value of 'MM/DD/YYYY' from type java.l
hi experts,
iam calling an RFC using SAP_JCO_Function. one of the input parameters is date which shud be in the format 'MM/DD/YYYY' but when i create a transaction property of data type DATETIME the format changes to " 2007-06-21 14:31:50 ". to refrain form passing this value at run time i have defined the transaction property as string and defaulted the value to MM/DD/YYYY.
When i execute the RFC i get the error "Cannot convert a value of 'MM/DD/YYYY' from type java.l".
Issue is with time field as well. Any suggestions would be appreciated.
Thanks,
AvinashHi
You can use datefromxmlformat( datetime, toformat ) .
in toformat you give: "MM/dd/yyyy" and in datetime you pass your xml format date like: 2007-06-21 T14:31:50.
Try like this. Hope this may help you.
Thanks -
Adobe Acrobat XI pro version, Windows 7, running on iMac parallels, converting pdf to a pdf with reduced size is not possible, error: error in converting the file! What to do? Its a bit annoying not to be able to store pdf files in reduced size, any idea?? Thanks, Jörg
Hi Jorg ,
Are you trying to reduce the file size with the "Reduced size PDF" in the save as other option.
Give it a try if you haven't done it prior.
Open that PDF>File>Save as Other>Reduced size PDF.
If possible ,please share the snapshot of the error message with us so that we can have a look in order to assist you further.
Regards
Sukrit Dhingra -
Error in converting exchange rate from to AED
Dear All,
When creating sales order I am receiving following error: Condition ZPRS: Error in converting exchange rate from to AED.
Such a error I am receiving when in material - there is not mantained delivery plant but this is not this case.
(interesting is that from FX currency is missing...)
I have also tried to play with customizing with plant assignment but without a result - this error is only in productive system in test everything is working fine...
??? any ideas ???
many thanks for any brainstorming...
Brgds. MIchalDear Michal Duris ,
Have you maintained the currency conversion factors
Check the following tcode
OBBS
OB08
Compare between the production server and server in which there is no error (CHOOSE YOUR EXCHANGE RATE TYPE / DOCUMENT CURRENCY AND LOCAL CURRENCY )
Check and revert back.
If its not solved, please provide the error message number.
Thanks & Regards,
Hegal K Charles -
Error while converting jad and jar to alx and cod files
hi all,
i am getting an error while converting jad and jar files into cod and alx files for balckberry.. here is the error i am getting.. can anyone help me this regard...
Parsing classfile: txtCanvas.class
I/O Error: Import file not found: d:\Research In Motion\BlackBerry JDE4.6.0\lib\
net_rim_api.jar
thanks in advacne
pallavithank you very much for your responses. can i send my cod and alx files to check. if you are interested only.
here is the command which i used to convert my jad and jar files
D:\Research In Motion\BlackBerry JDE 4.6.0\bin>rapc import="d:\Research In Motio
n\BlackBerry JDE 4.6.0\lib\net_rim_api.jar" codename=MoBilalMIDlet -midlet jad=M
oBilalEnglish.jad MoBilalEnglish.jar
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