String.replaceAll strange behavior...

I have found strange behavior of String.replaceAll method:
"aaaabaaaa".replaceAll("b","a"); // working fine
"aaaabaaaa".replaceAll("b","a${"); // throws an exceptionThat could be probably a bug?
p.s. using jdk_1.6.0_12-b04

Welcome to the Sun forums.
>
"aaaabaaaa".replaceAll("b","a${"); // throws an exception
Please always copy/paste the [exact error message|http://pscode.org/javafaq.html#exact]. We do not have crystal ball, and cannot see the output on your PC.
>
That could be probably a bug? >(chuckle) It has more to do with special characters in Strings, that need to be escaped. I am not up on the fine details, but try this code.
import javax.swing.*;
class TestStringReplace {
public static void main(String[] args) {
    String result = "aaaabaaaa".replaceAll("b","c"); // working fine
    JOptionPane.showMessageDialog(null, result);
    result = "aaaabaaaa".replaceAll("b","c\\${"); // chars escaped
    JOptionPane.showMessageDialog(null, result);
}

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Strange behavior of std::string find method in SS12

Hi
I faced with strange behavior of std::string.find method while compiling with Sunstudio12.
Compiler: CC: Sun C++ 5.9 SunOS_sparc Patch 124863-14 2009/06/23
Platform: SunOS xxxxx 5.10 Generic_141414-07 sun4u sparc SUNW,Sun-Fire-V250
Sometimes find method does not work, especially when content of string is larger than several Kb and it is needed to find pattern from some non-zero position in the string
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See below the code of tool.
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In this case std::string failes to find "endobj" from some position in the string,
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Message was edited by:
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Strange Behavior in modifying the values in VO

I have a VO based on EO from a custom table. The query is something like:
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Code in AM:
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Object Y = r.getAttribute("Y");
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Please help me out in finding out the reason for this strange behavior.

This nature is fine, basically initially your EO x and y columns are null and unless you do a commit, these values don't go in db. The third column will take x and Y coumns values from db and multiply and will get null.
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---Mukul

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I am having a strange behavior in a table with drag and drop and action component to delete row.
Steps:
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I add the source code if you see where I'm wrong
Java class:
+public class BeanExample {+
private ArrayList<RowExample> starttValues;
private ArrayList<RowExample> endValues;
+public BeanExample() {+
super();
+}+
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this.starttValues = starttValues;
+}+
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+if (starttValues == null) {+
starttValues = new ArrayList<BeanExample.RowExample>();
starttValues.add(new RowExample("1", new Number(158)));
starttValues.add(new RowExample("21", new Number(12565464)));
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return starttValues;
+}+
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this.endValues = endValues;
+}+
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+if (endValues == null) {+
endValues = new ArrayList<BeanExample.RowExample>();
+}+
return endValues;
+}+
+public void validatorExample(FacesContext facesContext, UIComponent uIComponent, Object object) {+
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FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, "ES PAR", "ES PAR");
throw new ValidatorException(message);
+}+
+}+
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Transferable transferable = dropEvent.getTransferable();
DataFlavor<RowKeySet> rowKeySetFlavor = DataFlavor.getDataFlavor(RowKeySet.class, "loteDrag");
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CollectionModel dragModel = transferable.getData(CollectionModel.class);
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Object currKey = rowKeySet.iterator().next();
dragModel.setRowKey(currKey);
RowExample table = (RowExample)dragModel.getRowData();
getEndValues().add(new RowExample(table.getId(), table.getValue()));
return dropEvent.getProposedAction();
+}+
+}+
return DnDAction.NONE;
+}+
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endValues.remove(0); RequestContext.getCurrentInstance().addPartialTarget(FacesContext.getCurrentInstance().getViewRoot().findComponent("pc1:t2"));
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+public static class RowExample {+
private String id;
private Number value;
+public RowExample(String id, Number value) {+
super();
this.id = id;
this.value = value;
+}+
+public void setId(String id) {+
this.id = id;
+}+
+public String getId() {+
return id;
+}+
+public void setValue(Number value) {+
this.value = value;
+}+
+public Number getValue() {+
return value;
+}+
+}+
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+<?xml version='1.0' encoding='windows-1252'?>+
+<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"+
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
+<jsp:directive.page contentType="text/html;charset=windows-1252"/>+
+<f:view>+
+<af:document id="d1">+
+<af:form id="f1">+
+<af:panelGroupLayout id="pgl1">+
+<af:table value="#{beanExample.starttValues}" var="row"+
rowBandingInterval="0" id="t1" rowSelection="single"
displayRow="selected" contentDelivery="immediate">
+<af:column sortable="false" headerText="Id" align="start" id="c2">+
+<af:outputText value="#{row.id}" id="ot1"/>+
+</af:column>+
+<af:column sortable="false" headerText="Value" align="start" id="c1">+
+<af:outputText value="#{row.value}" id="ot2"/>+
+</af:column>+
+<af:collectionDragSource actions="COPY" modelName="loteDrag"/>+
+</af:table>+
+<af:panelCollection id="pc1">+
+<f:facet name="toolbar" >+
+<af:toolbar id="dc_t2" >+
+<af:commandToolbarButton shortDesc="Delete"+
icon="/imagesDemo/delete_ena.png"
id="dc_ctb3" immediate="true"
+actionListener="#{beanExample.borrarFila}"/>+
+</af:toolbar>+
+</f:facet>+
+<af:table value="#{beanExample.endValues}" var="row"+
+rowBandingInterval="0" id="t2">+
+<af:column sortable="false" headerText="Id" align="start" id="c3">+
+<af:outputText value="#{row.id}" id="ot3"/>+
+</af:column>+
+<af:column sortable="false" headerText="Value" align="start" id="c4" >+
+<af:inputText value="#{row.value}" autoSubmit="true" id="it1" validator="#{beanExample.validatorExample}"/>+
+</af:column>+
+<af:collectionDropTarget actions="COPY" modelName="loteDrag"+
+dropListener="#{beanExample.handleDrop}"/>+
+</af:table>+
+</af:panelCollection>+
+</af:panelGroupLayout>+
+</af:form>+
+</af:document>+
+</f:view>+
+</jsp:root>+

I think the problem is the validator
I changed the practical case, I added an InputText to enter new values in the first row.
+<af:inputText immediate="true" label="new value" id="it2"+
+valueChangeListener="#{beanExample.newvalue}" autoSubmit="true"/>+
+public void newvalue (ValueChangeEvent valueChangeEvent) {+
+String valor = (String)valueChangeEvent.getNewValue();+
+Number valorNumber=null;+
+try {+
+valorNumber = new Number (valor);+
+} catch (SQLException e) {+
+}+
+RowExample example = (RowExample) endValues.get(0);+
+example.setValue(valorNumber);+
+example.setId(valorNumber.toString());+
+RichTable table = (RichTable)FacesContext.getCurrentInstance().getViewRoot().findComponent(id);+
+RequestContext.getCurrentInstance().addPartialTarget(table);+
+}+
Case 1
I drag the first row to the target table (ok)
The new row appears (ok)
Enter the value 77 in the InputText (ok)
id content and value change (ok)
Case2
I drag the first row to the destination table
The new row appears (ok)
Change the value of the first row by 80 (ok)
errors appears (by validator) (ok)
Enter the value 77 in the InputText (ok)
the id is changed but the value NO (*KO*)
I do not understand the behavior
Edited by: josefuente on 27-oct-2010 16:03

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thanks.
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I found it in the document
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<navigation-rule>
<from-view-id>/welcomeJSF.jsp</from-view-id>
<navigation-case>
<from-outcome>select</from-outcome>
<to-view-id>/secondPage.jsp</to-view-id>
</navigation-case>
</navigation-rule>
<managed-bean>
<managed-bean-name>bean</managed-bean-name>
<managed-bean-class>Buggy.Bean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
One can see, that navigation is always controlled with the one constant string literal -- select. The bean is called just "bean" and it exists during a session.
First page is (header and footer skipped):
<f:view>
<h:form>
<h:commandLink id="link1" action="select" value="link1 (hardcoded)"/>
<h:panelGrid id="panel" binding="#{bean.panel}" columns="20" border="1" cellspacing="0">
<h:commandLink id="link2" action="select" value="link2 (hardcoded)"/>
</h:panelGrid>
</h:form>
</f:view>
One can see, that there are two hardcoded hyperlinks, one is inside the panelGrid, second is outside. Also it is seen, that the panel is binded with bean property as a whole.
The second page is just displaying a text to be sure the navigation occured.
Now the bean (header and footer skipped):
private HtmlPanelGrid panel;
public HtmlPanelGrid getPanel() {
return panel;
public void setPanel(HtmlPanelGrid panel) {
this.panel = panel;
Application application = FacesContext.getCurrentInstance().getApplication();
MethodExpression expr = application.getExpressionFactory().createMethodExpression(FacesContext.getCurrentInstance().getELContext(), "select", String.class, new Class[0]);
HtmlCommandLink link = (HtmlCommandLink) application.createComponent(HtmlCommandLink.COMPONENT_TYPE);
link.setId("link3");
link.setValue("link3 (softcoded)");
link.setActionExpression(expr);
panel.getChildren().clear();
panel.getChildren().add(link);
One can see, that a third (softcoded) hyperlink is added to the panel dynamically, with preliminary clearing panel content.
* STRANGENESSES *
1) despite the fact, that the panel is cleared prior to adding softcoded hyperlink, I CAN see it on the page (all 3 hyperlinks are seen)
2) in the debugger I can see, that while executing code, the children list is empty; this can mean, that the order of execution of the Jave code and JSP code is reversed; despite this fact, I see the hardcoded link BEFORE the softcoded
3) the link2 (hardcoded) is not work, i.e. it is not leads the second page to be displayed
4) if I comment the line panel.getChildren().clear(); then all 3 hyperlinks start to work

But when I put links creation code in bean's constructor, it was lost.
It seems to me, that the system creates panel independently and only after that calls setter of my bean. Ergo, the data from the panel field, initialized in constructor is overwrited.
Where I should place programmatic filling of panel element?

Strange behavior of GetStringUTFChars in Linux

Good evening!
I made an implementation of a native method in C++ for Windows and Linux, in windows it works fine, but in Linux I have a strange behavior of GetStringUTFChars here is the piece code :
JNIEXPORT jint JNICALL Java_MyNativeMethod
(JNIEnv *env, jobject obj, jstring IpAddress) {
const char * ccpIpAddress = env->GetStringUTFChars(IpAddress, 0);
jsize size = env->GetStringLength(ccpIpAddress);
trace("IpAddress : %s size: %d", ccpIpAddress, size);
Absolute normal... but when I pass as parameter a string '192.168.1.11'
I receive from 'IpAddress : HBĽ1 size: 0' to 'IpAddress : P9D7D6DwD�MS\H#M\H : 251'
I made a little and simple test to print a String to verify if is Linux problem but IT WORKED FINE!
I've notice that the differences between both programs are that the wrong one has been linked with a C lib, but the #define __cplusplus is OK also, and all the compile process use C++ code...
This is my compilation line
g++ -o lib{myLib}.so {myImpl}.cpp lib{C li}.so libstdc++.so -I {JAVA_HOME}/include/ -I {JAVA_HOME}/include/linux/ -shared -static -L{JAVA_HOME}/jre/lib/i386/
(variables put for clarity) and (I tried with gcc also)
the libstrd++.so is been used in my simple test link options too.
I was wondering if there is some -Doption which should be defined that
functions->GetStringChars(this,str,isCopy); implementation ask for...
or if the link with a C code is messing the things in a different behavior
Thanks for the help
Pedro Ribeiro
Sao Paulo - Brazil

JNIEXPORT jint JNICALL Java_MyNativeMethod
(JNIEnv *env, jobject obj, jstring IpAddress) {
const char * ccpIpAddress = env->GetStringUTFChars(IpAddress, 0);
jsize size = env->GetStringLength(ccpIpAddress);
trace("IpAddress : %s size: %d", ccpIpAddress, size);
=====================
You tried to get the string length of C character array.
I think you can get the length of jstring alone.
Please advice me if I am wrong

STRANGE BEHAVIOR OF NVL

Hi everybody,
Can you please explain me this strange behavior of NVL function:
SQL> select nvl(10000,'none') from dual;
select nvl(10000,'none') from dual
ERROR at line 1:
ORA-01722: invalid number
SQL> select nvl('none',10000) from dual;
NVL(
none
Can you explain what goes on internally to make these statements different?
I mean why is it expecting a number(as a second arg) in Case 1 and why is it not expecting a character string as a second arg in Case 2? Has it got to do with implicit type-conversion?
Finally, does NVL need both arguments of the same type?
Any help will be greatly appreciated.
Thanks.
Kishore.

The return type of NVL is the datatype of the first argument. If the two arguments have different datatypes Oracle applies a conversion. That's why you got your results: in effect what you were running was
select nvl(10000,to_number('none')) from dual;and
select nvl('none',to_char(10000)) from dual;Of course, 'none' is not a valid number, hence the ORA-1722 result, whereas 10000 can be successfully rendered as a string.
If you do not provide NVL with arguments of the same datatype it will apply an implicit conversion to the second datatype. It is always better (that is safer) to avoid implicit data conversion.
Cheers, APC
P.S. For bonus points, which argument determines the datatype of a DECODE function?

Compiler strange behavior

Hi friends,
I dont know whether this is the right forum page to post this topic.
I've observed a strange behavior of the java compiler may be it is programmed for so.
As we all know that java.lang.System.arraycopy(Object,int,Object,int,int) method can be used to copy the objects & primitive type arrays, how come? for instance
    String s[] = new String[]{"1", "2"};
    String c[] = new String[s.length];
    System.arraycopy(s, 0, c, 0, s.length); // compiles for objects "and"
    byte b[] = new byte[]{1,1,1};
    byte e[] = new byte[b.length];
    System.arraycopy(b, 0, e, 0, b.length); // compiles for primitive as wellI'm not pin-pointing or arguing just wondering & curious. May be the above is an exception to the Compiler.
Can any one of you clear my curosity?
regards,
Afroze.

All arrays are Objects, even arrays of primitive data types. They are treated specially, in terms of syntax and by the compiler, but they are still objects with fields (like "length") and methods (like "clone()").
So in the method arraycopy(Object,int,Object,int,int), the Object arguments can be primitive or Object arrays. Does that help?

String.replaceAll strange behavior...

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