Why it is giving compilation error

byte b = 50;
byte c = 50*2; //giving compilation error
why????

It shouldn't give you compilation errors. It compiles
fine using JDK 1.4Maybe an earlier compiler (one that doesn't bother to actually check the int literals) is griping about a potential loss of precision, would be my only guess...

Similar Messages

Do java programms after giving compilation error generates .class file?

Do java programms after giving compilation error generates the .class file?
Do any outer class may have the private as access modifier?
If someone asks you that -do any program in java after giving a compilation error gives the .class file -do any class except(inner class)
be defined as private or static or protected or abc or xxx Now type the
following program
private class test
public static void main(String s[])
System.out.println("Hello!How are You!!");
-Compile it.... You must have
received this error test.java:1:The type type can't be private. Package members are always accessible within the current package. private class
test ^ 1 error
Here please notify that compiler has given the
error not the warning therfore .class file should not be created but now type
>dir *.class
___________ and you will see that the
test.class file existing in the directory nevertheless this .class file
is executable. if you will type __________________ >java test
it will
wish you Hello! and suerly asks you that How are You!! ________________!
You can test it with the following as acces modifiers and the progrm will run Ofcourse it will give you compilation error.
protected
xxx
abc
xyz
private
Do you have any justification?

Hmm,
I've been working with different versions of jdk since, if I'm not mistaken, jdk1.0.6 and never was able to get *.class with compilation errors. It was true for Windows*, Linux, and Solaris*.
About the 'private'/'protected' modifier for the type (class) - it makes perfect sence not to allow it there: why would anyone want to create a type if no one can access it? There should be a reason for restricting your types - let's say, any inner class can be private/protected.
For ex., you shouldn't have compile problems with this:
class Test
public static void main(String s[])
System.out.println("Hello!How are You!!");
private class ToTest{}
Sorry, but I don't really know where you can read up on that.

Custom Function giving compile error

Hi All,
I have created a custom function to get the current time stamp. Below is the java code:
package com.oracle.determinations.examples;
import com.oracle.determinations.engine.CustomFunction;
import com.oracle.determinations.engine.EntityInstance;
import java.util.*;
import java.text.*;
public class CurrentTimeStamp extends CustomFunction {
   public Object evaluate(EntityInstance entityInstance, Object[] objects) {
      Date dNow = new Date( );
      SimpleDateFormat ft =
      new SimpleDateFormat ("MM/dd/yyyy HH:mm:ss");
    /*System.out.println(ft.format(dNow));*/
      return ft.format(dNow);
My Extension.xml is as below:
<?xml version="1.0" encoding="utf-8"?>
<extension>
<functions>
    <function name="CurrentTimeStamp" return-type="text">
<arg name="entered-name" type="text"/>
       <handler platform="java" class="com.oracle.determinations.examples.CurrentTimeStamp"/>
      </function>
</functions>
</extension>
The extension.xml is placed under following path:
Development/Extension/CurrentTimeStamp/extension.xml
The JAR file is palced under following path:
Development/Extension/CurrentTimeStamp/lib/CurrentTimeStamp.jar (the jar file includes the com.oracle.determination.example folder structure)
When i am using CurrentTimeStamp() in the rule base, it is throwing compile error saying:
Error after text CurrentTimeStamp(' Fount Text: ')'. Exptected value variable or constant OPA - E00111
Can you please help me where i am getting wrong and why it is not identifying the function?
Thanks,
KK

Hi,
I tried using the function with blank arguments like:CurrentTimeStamp("") and it was compiled successfully. When I tried running this rulebase in the tomcat server (web determinations).. i got the below error; Can someone please let me know what is happening here:
HTTP Status 500 - Servlet.init() for servlet WebDeterminationsServlet threw exception
type Exception report
message Servlet.init() for servlet WebDeterminationsServlet threw exception
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet.init() for servlet WebDeterminationsServlet threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source)
root cause
java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0 java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClassCond(Unknown Source) java.lang.ClassLoader.defineClass(Unknown Source) java.lang.ClassLoader.defineClass(Unknown Source) com.oracle.determinations.engine.local.CustomResourceClassLoader.findClass(CustomResourceClassLoader.java:120) java.lang.ClassLoader.loadClass(Unknown Source) java.lang.ClassLoader.loadClass(Unknown Source) java.lang.Class.forName0(Native Method) java.lang.Class.forName(Unknown Source) com.oracle.determinations.util.PlatformClassLoader.newInstance(PlatformClassLoader.java:61) com.oracle.determinations.engine.local.RulebaseLoader.loadCustomFunctions(RulebaseLoader.java:267) com.oracle.determinations.engine.local.RulebaseLoader.loadRulebase(RulebaseLoader.java:178) com.oracle.determinations.interview.engine.InterviewRulebase.<init>(InterviewRulebase.java:137) com.oracle.determinations.interview.engine.local.LocalRulebaseService.applyChangeSet(LocalRulebaseService.java:250) com.oracle.determinations.interview.engine.plugins.rulebaseresolver.ClassloaderRulebaseResolverPlugin.initialise(ClassloaderRulebaseResolverPlugin.java:73) com.oracle.determinations.interview.engine.local.LocalRulebaseService.<init>(LocalRulebaseService.java:53) com.oracle.determinations.interview.engine.local.LocalInterviewEngine.initialise(LocalInterviewEngine.java:181) com.oracle.determinations.interview.engine.local.LocalInterviewEngine.<init>(LocalInterviewEngine.java:66) com.oracle.determinations.interview.engine.InterviewEngineFactory.createInstance(InterviewEngineFactory.java:19) com.oracle.determinations.web.platform.servlet.WebDeterminationsServletContext.init(WebDeterminationsServletContext.java:180) com.oracle.determinations.web.platform.servlet.WebDeterminationsServletContext.<init>(WebDeterminationsServletContext.java:116) com.oracle.determinations.web.platform.servlet.WebDeterminationsServlet.init(WebDeterminationsServlet.java:73) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.40 logs.

Query giving compilation error

hi,
i am confused that my query is working fine on back-end sqlplus, but as i put to use it in my form
at pre-form to know count, it gives compilation error;
sqlplus
SELECT COUNT(*) M_CNT1
FROM(
SELECT POH_CODE||'-'||POH_NO CODE,NVL(POH_FREIGHT_lc_amount,0)
-NVL((
SELECT SUM(FTH_LC_AMOUNT)
   FROM FIN_TXN_HEADER
WHERE FTH_REF_CODE = POH_CODE
    AND FTH_REF_NO = POH_NO
    AND FTH_ACNT_CODE = 'AC1009'
GROUP BY FTH_REF_CODE,FTH_REF_NO),0) NET, POH_CODE, POH_NO
FROM PURCHASE_ORDER_HEADEr
WHERE NVL(POH_FREIGHT_LC_AMOUNT,0) > 0);
    M_CNT1
         1
in pre-form
declare
m_cnt1 number;
BEGIN
SELECT COUNT(*) INTO M_CNT1
FROM(
SELECT NVL(POH_FREIGHT_lc_amount,0)
-NVL((
SELECT SUM(FTH_LC_AMOUNT)
   FROM FIN_TXN_HEADER
WHERE FTH_REF_CODE = POH_CODE
    AND FTH_REF_NO = POH_NO
    AND FTH_ACNT_CODE = 'AC1009'
GROUP BY FTH_REF_CODE,FTH_REF_NO),0) NET
FROM PURCHASE_ORDER_HEADER
WHERE NVL(POH_FREIGHT_LC_AMOUNT,0) > 0);
END;return error;
Error 103 at line 11, column 2
Encountered the symbol "SELECT" when expecting on of the following:
( - + mod not null others<an identifier>
<a double-quoted delimited-identifier> <a bind variable> avg
count current exists max min prior sql stddev sum variance
cast<a string literal with character se specification>
<a number> <a single-quoted SQL string>
Error 103 at line 16, column 36
Encountered the symbol "," when expecting on of the following:
) intersect minus union
i think the problem is continuation line or single quote.
what is it can anybody help me please? tyvm.

>
Error is in this line.
Use : before M_CNT1hi Navneet,
m_cnt1 is neither a db-or-a-non-db-block item.
so how come i used : sign before m_cnt1.
i guess the problem is below sonewhere may be,
-NVL((
SELECT SUM(FTH_LC_AMOUNT)       --- line 11
                     OR
GROUP BY FTH_REF_CODE,FTH_REF_NO),0) NET    --line 16

Why does plsql give compilation error for select statement?

When I run following plsql program, it gives compilation error. Could somebody please point me out what could be wrong here? I am running it from system user.
create or replace procedure drop_user_proc (iname in varchar2) is
uname varchar2(100);
begin
select username into uname from dba_users where username = upper(iname);
end drop_user_proc;
select username from dba_users where username = upper('newuser');
When I run it, I get following error. dba_users is there that is the reason it works outside plsql block, but it doesn't from inside block.
SQL> @t4
Warning: Procedure created with compilation errors.
USERNAME
NEWUSER
SQL> show err
Errors for PROCEDURE DROP_USER_PROC:
LINE/COL ERROR
4/3 PL/SQL: SQL Statement ignored
4/35 PL/SQL: ORA-00942: table or view does not exist

Role based grants are not available within the stored procedures.
Only explicit grants are recognized when compiling stored code.
You need to grant select on that table to the user where you are creating this procedure.

Why procedure created with compilation errors?

CREATE or REPLACE PROCEDURE AddStudent(
p_stuID number,
p_lname varchar2(30),
p_fname varchar2(20),
p_major varchar2(5) check(major IN
('ACCT','ECT','EET','BIS','BSIT','CIS','TCOM')),
P_standing varchar2(10) check(standing IN
('FRESHMAN','SOPHOMORE','JUNIOR','SENIOR')),
P_gpa number(3,2) IS
BEGIN
INSERT INTO STUDENT (P_STUID, P_LNAME, P_FNAME, P_MAJOR,
P_STANDING, P_GPA, P_ADVISOR) VALUES
(STUDENT_SEQ.NEXTVAL, 'SMITH', 'HEATHER', 'CIS', 'JUNIOR', 3.8,
2);
INSERT INTO STUDENT (P_STUID, P_LNAME, P_FNAME, P_MAJOR,
P_STANDING, P_GPA, P_ADVISOR) VALUES
(STUDENT_SEQ.NEXTVAL, 'ELLIOTT', 'DAVE', 'CIS', 'JUNIOR', 3.65,
2);
COMMIT;
END;
SQL> /
Warning: Procedure created with compilation errors.
any help would be appreciated

I would guess it's because you can't use CHECK like that (at
least not in Oracle 8i). If you want to check the validity of
procedural parameters you'll have to code this sort of thing:
BEGIN
IF major NOT IN ('whatever', 'etc') THEN
RAISE_APPLICATION_ERROR(-22200, 'Invlaid value for MAJOR');
ELSIF ....
For future reference you can use the SQL*Plus command SHOW ERR
to see what went wrong - it gives you line numbers and error
messages.
HTH, APC

Upgrade from 6.40 - 7.10, Analyzer giving compile errors

We are testing out an upgrade to SAP GUI 7.10 (SP 9, V7100.2.9.1039), BEx (SP7 P1 R1352).
When running queries in the Analyzer, we get the following error "Compile Error: Can't find project or library" and the VB editor pops up to the following VB code:
Public Function BEx() As BExApplication
Set BEx = Application.Run("BExAnalyzer.xla!GetBEx")
End Function
I can shut down the debugger and the results are available but the VB windows continually pops up when any modifications are made to the report.
The following shows up in the trace although I'm not sure if it is related:
* Trace Started as: 10/10/2008 10:11:17 AM*
ListSeparator: ,
ExcelVersion: 11.0
AddinVersion: 7100.3.701.1352
BExCheckFrontend.CheckFrontend: No Check performed (20081003) 0
Errors while executing the 7.0 exit : SAPBEXonRefresh
-2146788248
Exception from HRESULT: 0x800A9C68
   at Microsoft.VisualBasic.CompilerServices.LateBinding.InternalLateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack, Boolean IgnoreReturn)
   at Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateCall(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean IgnoreReturn)
   at com.sap.bi.et.analyzer.addin.BExItemGrid.CallExitSAPBEXonrefresh()
-------------------10/10/2008 10:20:39 AM-------------------
System.Runtime.InteropServices.COMException (0x800A9C68): Exception from HRESULT: 0x800A9C68
   at Microsoft.VisualBasic.CompilerServices.LateBinding.InternalLateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack, Boolean IgnoreReturn)
   at Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateCall(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean IgnoreReturn)
   at com.sap.bi.et.analyzer.addin.BExConnect.FindLF(Object& iRange, Object& eRange)
Exception from HRESULT: 0x800A9C68
   at Microsoft.VisualBasic.CompilerServices.LateBinding.InternalLateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack, Boolean IgnoreReturn)
   at Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateCall(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean IgnoreReturn)
   at com.sap.bi.et.analyzer.addin.BExConnect.FindLF(Object& iRange, Object& eRange)
Any debug ideas or suggestions would be appreciated.
Thanks

Hi Adam,
Can you please check that the following settings are correct in Excel.
      1. Make the following setting in Excel:
          o Tools
          o Macros
          o Security
          o Trusted Sources
          o [x] Trust Access to Visual Basic Visual Basic Projects (CheckBox))
Also ensure that the default macro security setting is set to "Low".
Let me know how you go.
Cheers
Shaun

FPGA code successfully compiled in 2010 is giving compilation error in 2014.

I have developed RS485 FPGA code and successfully compiled with LabVIEW FPGA 2010.
Later changed the software to 2014 and installed Xilinx 14.7.
Now if I compile the same code with LabVIEW 2014 compile worker, i am getting error 'Process "Synthesis" failed'.
I am using a case structure with Error cluster as selector, So the case structure has 'No error' and 'Error' cases.
If I change the selector to 'True/False' then the compilation works.
Below is the error that i am getting when using Case structure with Error cluster as selector
LabVIEW FPGA: The compilation failed due to a Xilinx error. Details: ERROR:HDLParsers:1401 - "C:/NIFPGA/jobs/JyWfWcc_Gv3a9ah/NiFpgaAG_00000041_CaseStructureFrame_0001.vhd" Line 41. Object tunnel_s_error_out_2007 of mode OUT cannot be read. ERROR:HDLParsers:1401 - "C:/NIFPGA/jobs/JyWfWcc_Gv3a9ah/NiFpgaAG_00000041_CaseStructureFrame_0001.vhd" Line 42. Object tunnel_s_error_out_2007 of mode OUT cannot be read. --> Total memory usage is 190240 kilobytes Number of errors : 2 ( 0 filtered) Number of warnings: 1 ( 0 filtered) Number of infos : 0 ( 0 filtered)

Attached FPGA_error_2014.jpg which depicts the working and 'not working' code in 2014.
In 'Not working' code,the selector terminal is error cluster.
I am able to resolve the issue just by changing the selecter terminal to boolean as in 'working code'.
But both sets of software code works fine in version 2010.
Attachments:
FPGA_error_2014.jpg ‏128 KB

Why java is giving 'attempting to assign weaker access privileges' error?

Can some one can tell me why java is giving 'attempting to assign weaker access privileges' compile error while compiling Abhishekchild.java ?
The two classes is :
public class Abhishek {
       void asd()
     System.out.println("hello");
          static String a;
          public static void main (String st[])
public class Abhishekchild extends Abhishek {
     private void asd()
     System.out.println("hello");
          static String a;
          public static void main (String st[])
}In my opinion, java compiler is showing the error , as method asd has public visibility in Abhishek. java so
(i)it should be visble to all sub classes of Abhishek.java.
But if we override this function in Abhishekchild.java, and change the visibility to private then it will not be available for child of Abhishekchild.java. But these children are also children of Abhishek.java*, but this violates rule (i).*
So java shows a compilation error.

public class Parent {
     public void asd() {
          System.out.println("Hello");
class Child extends Parent {
     public void asd() {
          System.out.println("Hello from child");
     public static void main(String st[]) {
          Parent parentReference = new Child();
          // The reference 'parentReference' knows about Parent.
          // Parent has a public method asd, so below code looks ok.
          // But if child could set the method to private,
          // invoking the code below, would hit the object Child,
          // where asd() is not accessible - and everything fails.
          // Note - the compile visibility is checked according to
          // the reference, not the object itself.
          parentReference.asd();
}See my comments in the code.
- Roy

HT1692 iPod keeps giving the error "unknown error" when trying to sign in.Why?

iPod keeps giving "unknown error" when signing in. Why?

Signing into what?
Is "unknown error" the complete error number?

Compile error when using Collections.sort for Vector, why?

The compiler is giving an error when trying to do this (I'm using JDK 1.5.0_09):
Vector <String> test = new Vector <String>();
test.add("test1");
test.add("test2");
test.add("test3");
Collections.sort(test);The error being:
The method sort(Vector<String>) is undefined for the type Collections
Collections.sort takes List, but Vector is of type List, so this should work, correct?

ChuckBing wrote:
No. Vector is not a subclass of List. Use List.um.. Vector implements List

Compilation error, why???

this procedure always generate compilation error listed below, I don't understand, anyone has a clue?? Thanks!!!
LINE/COL ERROR
3/18 PLS-00103: Encountered the symbol "(" when expecting one of the
following:
:= . ) , @ % default character
The symbol ":=" was substituted for "(" to continue.
create or replace procedure test1234 (
v_project projects.id%TYPE,
v_yesno char(1)) as
cursor c_table is
select table_name from user_tab_columns
where column_name = 'PRO_ID'
          and table_name not like '%_DEL'
     and table_name not like '%_REP'
          and table_name not like 'USER_%'
          and table_name not like '%_OLD'
          and table_name not like '%_TEST'
          and table_name not like 'DAVID%'
          and table_name not like '%_BAK';
v_table           varchar(30);
child_table           varchar(30);
parent_table          varchar(30);
v_count           number(15);
l_count           number(15);
child_count           number(15);
tbl_count           number(15);
begin

You must n ot specify the length of the string in the declaration.
Thats why line 3 has to be:
     v_yesno char) asHTH
Jens

Why no compile error in this code ?

strings are immutable... we can not alter it... so why the below does not create compile error ? it is an attempt to alter the string.
class test
public static void main(String args[])
    String s1 = new String("amit");
    s1.concat("Poddar");    // why no error ?
    System.out.println(s1);
}

strings are immutable... we can not alter it... so
why the below does not create compile error ? First of all, Strings are immuatable because the String class is coded that way - there willnever be a compiler error to stop you from altering a String's value (which is actually possible via reflection). This is similar to you writing your own class that has a private field and not providing any methods that can alter the field's value. Your new class would be considered immutable in the same way that Strings are considered immutable, and nobody can even attempt (except reflectively), to "alter" an instance of it, so there will never be a compiler error that is due to such an attempt.
it is an attempt to alter the string.No it isn't. The following is a quote from the Javadoc for String.concat:
"If the length of the argument string is 0, then this String object is returned. Otherwise, a new String object is created, representing a character sequence that is the concatenation of the character sequence represented by this String object and the character sequence represented by the argument string."

Why is my ical giving me errors every time I open it? I'm trying to sync it with my phone.

why is my ical giving me errors every time I open it? I'm trying to sync it with my phone.

And what might these error messages be?

Why not compile error on "incompatible interface cast"?

simeple code here
class IncompInterfaceTest {
void doTest() {
ClassB b = new ClassB();
InterfaceA a = (InterfaceA)b;
interface InterfaceA{}
class ClassB{}
javac issues "ClassCastException" on runtime rather than compile
error.
as i know incompatible type casting may be caught at runtime and
compiler shows the error.
but why compiler doesn't do it's job for interfaces? it's just so
clear to be compile error to me.
ps. in a case ClassB is final class, compiler issues a error.
(a thread I started in google groups)
http://groups.google.co.kr/group/comp.lang.java.programmer/browse_thread/thread/c9c12a8864672436?hl=ko#

sun9h0st wrote:
thanks for reply.
I think i might know something wrong about class, object concept, so I wish you tell me more about it.
As I though the code below means
ClassB b = new ClassC();'b' can be an Object of ClassB as a subclass of ClassC.
'b' IS an Object of ClassC.b is not an object.
b is a variable that can point to an instance of ClassB or to an instance of any subclass of ClassB.
>
so
b instanceof ClassB == true // as it can be
b instanceof ClassC == true // as it is
If b is not null, the first line will always be true.
If b points to a ClassC or a subclass, the second one will be true.
It means actual Object(something behind 'b' pointing, i don't know what i call it) is from ClassC to me. (somewhat like c pointer,
'b' is a bowl that called Object and actuall instance is refered by 'b')No idea what you're saying here.
if b IS an Object of ClassB
shouldn't "b instanceof ClassC" is false?If we have C extends B, then...
B b1 = new B();
B b2 = new C();
b1 instanceof B // true
b1 instanceof C // false
b2 instanceof B // true
b2 instanceof C // true
I Think compiler should be known that instance 'b' hold. No, it doesn't, and it's good that it doesn't, as it keeps the language simpler and more consistent.
Also, b doesn't hold an instance. It holds a reference to an instance.

Why it is giving compilation error

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