Lowyat.NET: Latest topics by roustabout

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roustabout — Thu, 30 Jul 2015 07:22:35 +0800

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php coding in drop menu

roustabout — Sat, 15 Oct 2011 15:33:55 +0800

Hi all, I have this problem. I have gone through the codes and follow some examples codes from internet. But I still get an error

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here are my code

1)A form with a drop menu. The items in the drop menu are populated sql queries from the database

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2) A form that stores the item in the db

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Can you all point out the error. TQ

Keep getting the java.lang.NullPointerException

roustabout — Thu, 01 Mar 2007 18:40:42 +0800

Hi,

I suspect that my class didnt initialized when I did like this. For example, I have A , B and C class. In the class A:-

CODE

class A {

//instance variable
private int choice = 0;
private B b;
private C c;

//contructor
public A(){
if(choice == 1) {
b = new B();
}else{

c= new C();
}
}

I want that when choice = 1, class B get instantiated and choice other than the value 1, class C get instatiated. I also tried using the switch statement but still got java.lang.NullPointerException.

CODE

class A {

//instance variable
private int choice;
private B b;
private C c;

//contructor
public A(){
switch(choice) {
case 1:{ b = new B();
break;}
case 2: {c = new C();
break;}
}
}

How do I solve this?

thank you

Can bash script run perl & awk scripts

roustabout — Sat, 10 Feb 2007 22:13:25 +0800

Hi,

I'm interested in running one or more perl and awk script just simply with Bash script. Is it possible?

I'm using cygwin on Windows Xp.

Thanks.