raj baig

Hi All,

I am trying to optimize my code,can you tell me which is the best way of
doing

I am calling a method of a class more no of times in my code which
returns me a object

class A{ public String getId(){ return id; } } class B{ public A getAObject(){ } } class C{ main(){ B b=new B(); A a=b.getAObject(); } }



1. A a=b.getAObject();
a.getId();
2. new B().getAObject().getId()

here if i have to call getId method more times is it better to
once A object and using a ref call method.
or
instead of creating object directly call : new B().getAObject().getId()


Thanks in Advance
Raj

Hi ,

Just Look At The Code

public class TestTernary { static boolean var=true; public static boolean getValue(){ return var; } public static void main(String[] args) { (getValue())?setValue("true"):setValue("false"); } public static void setValue(String s1){ System.out.println(s1); } }


See if getValue() method return true then i want to set the value "true"
to setValue() method.

But it is giving exception like not a statement after ?:

when the condition becomes true i want to set the
value to setVAlue method.

Can you correct me.

Thanks in Advance,
Raj.

Hi ,

I want to display starting date and ending date of weeks in a month
i.e. this month(may) :
week starting date monday : 7
week ending date saturday : 12


can you tell me how to get it.
i am using calendar but need some help.

Thanks in Advance,
Raj.

Hi Jesper Young

The format method will return a string. But i want the string as date object.

because i have to set the date object to a java bean ,this date object
contains the format dd-mm-yyyy to store in db as db take the format
dd-mm-yyyy.

private date.
public setDate(java.sql.Date date){
thid.date=date
}

Awaiting for reply,
Raj.

Hi,
i want to convert a string in sql or util date object to insert in oracle database but in the same format .

String date="10-04-2006";
SimpleDateFormat df1=new SimpleDateFormat("dd-MM-yyyy");
Date d=df1.parse(date);
java.sql.Date sqlDate = new java.sql.Date ( t ) ;
System.out.println("date:"+sqlDate);


Here originally my string format is : dd-mm-yy 10-04-2006
Sql date returns after parsing : yyyy-mm-dd. 2006-04-10


Please tell me how to convert it.

----
Raj.

Hi,
I have a string contaings date.
String date="10-04-2007";
now i am converting it into sql date using simpledateformat's parse method
which returns me sql date but in different format.
ie. 2006-01-10

But i want the returned date objected should follow same format like
10-04-2007.

Can you assist me.

thangs in advance
raj.

Thanks All

Hi,
Userid column is already a primary key column.

Hi,
In my database i have user table contains user_id,password,email.
To insert a new row i am checking for the email.if email already exists
i am generating error message the email already exist.
Here my problem is i am interacting db twice.
1.select query returns true if user exists
2.insert data if select query returns false.

But i want this should happen in a single query.
Can you tell me how to do it.


Thanks in Advance,
Raj.

HI Ulf

this is doing fine.

Method[] theMethods=class.getDeclaredMethods();


Thanks:
Raj

hi ulf,
i dis same as you said. It is calling my methods + Object class methods.
But i don't want the object class methods to execute. How can i restrict.

Thanks.

HI All,
How can i call only user defined methods only not the Object class methods.
when i call invoke method it is calling my class methods as well Object
class methods.
How can i restrict Object class methods.

Thank you for your reply.

Hi Rahul,
The invoke method expects two objects.
Then how call.

Hi Rahul,
To call invoke() , it expects two objects to pass.
Then how call.

hi,
i have a class with two methods

public void metOne(){
System.out.println(" Hello ");
}

public String metTwo(){
return " Hai ";
}

in another class i am invoking the two methods

import java.lang.reflect.*; class TestReflect { public static void main(String[] args) { TestClass p = new TestClass(); showMethods(p); } static void showMethods(Object o) { try{ Class c = o.getClass(); Method[] theMethods = c.getMethods(); Object[] arguments = new Object[] {theMethods}; for (int i = 0; i < theMethods.length; i++) { String methodString = theMethods[i].getName(); System.out.println("Name: " + methodString); String returnString = theMethods[i].getReturnType().getName(); if(returnString.equals("java.lang.String")){ System.out.println(" [[[[[[[[[[[[ inside if ]]]]]]]]]]]]]] "); String str=(String)(theMethods[i]).invoke(methodString,arguments); System.out.println(" :::::::::::: " + str); } System.out.println(" Return Type: " + returnString); } }catch(Exception e){ e.printStackTrace(); } } }

It is giving me exception:

java.lang.IllegalArgumentException: object is not an instance of declaring class
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:585)
at TestReflect.showMethods(TestReflect.java:22)
at TestReflect.main(TestReflect.java:7)


can you tell me the mistake.

Thanks in advance,
raj.