accessing while loop variable

Question

I am using a scanner to retrieve from a textfile. When I try to access my info1 from outside of the while loop, it says variable info1 might not have been initialized but I have already initialised it outside of the while loop. how can I access it from outside the while loop with my code?

String info1,info2,info3,info4,info5,info6,info7;
boolean infoTrue = true;
do{ 
while(custInfo.hasNext())
  {

  info1 = custInfo.next();
  info2 = custInfo.next();
  info3 = custInfo.next();
  info4 = custInfo.next();
  info5 = custInfo.next();
  info6 = custInfo.next();
  info7 = custInfo.next(); 

  if(info2== loginID && info3==password)
  {
    infoTrue=false;
  }
  }
 }while(infoTrue!=false);
  System.out.println(info1);

Show us where you have initialized.

Achintya Jha
– Achintya Jha

2013-04-27 15:25:02 +00:00
Commented Apr 27, 2013 at 15:25 — Achintya Jha
– Achintya Jha, Commented Apr 27, 2013 at 15:25
Sorry. Updated already.

user1823986
– user1823986

2013-04-27 15:27:14 +00:00
Commented Apr 27, 2013 at 15:27 — user1823986
– user1823986, Commented Apr 27, 2013 at 15:27
Also, read this: How do I compare strings in Java? !!!

jlordo
– jlordo

2013-04-27 15:40:02 +00:00
Commented Apr 27, 2013 at 15:40 — jlordo
– jlordo, Commented Apr 27, 2013 at 15:40
Thanks alot. sorry for my bad programming habits.

user1823986
– user1823986

2013-04-27 15:43:25 +00:00
Commented Apr 27, 2013 at 15:43 — user1823986
– user1823986, Commented Apr 27, 2013 at 15:43

Achintya Jha · Accepted Answer · 2013-04-27 15:28:11Z

1

String info1,info2,info3,info4,info5,info6,info7;

Above line should be:

String info1="",info2="",info3="",info4="",info5="",info6="",info7="";

answered Apr 27, 2013 at 15:28

Achintya Jha

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Comments

Petr Mensik · Accepted Answer · 2013-04-27 15:25:01Z

1

You have to initialize it before the while loop like

String info1 = "", info2 = "";//rest is the same
//your loop

You can also use shortcut like

String info1 = info2 = info3 = "";

answered Apr 27, 2013 at 15:25

Petr Mensik

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Comments

Harsha · Accepted Answer · 2013-04-27 15:31:35Z

0

According to your code, you have two while loops, probably you might have initialized it inside first while loop, but you are accessing it outside both loops. Hence make sure you have initialized it outside both loops.

String info="";
do{
    while{
    }
while();
Sysout(info);

Also put a break point and see where it is going !

answered Apr 27, 2013 at 15:31

Harsha

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