About stack

[ttea]

I am testing to throw out a value in the array, like myarray={"9","0","8"} change to array={"9","8"}

Code:

String location[] = request.getParameterValues("select"
java.util.Stack stack = new java.util.Stack();
int losize=java.lang.reflect.Array.getLength(location);

for(int j=0;j<losize;j++)
{
if(location[j] !=&quot;0&quot
stack.push(location[j]);
}

while (!stack.isEmpty())
out.println(stack.pop()+&quot;<br>&quot;

But the output is just the reversed order, &quot;0&quot; still in there, like {9,0,8}, become {8,0,9} only, what's wrong?

 

[Hattusas]

Stack has a logic of first in last out.(FILO)

try this

for(int j=(losize-1);j>=0;j--)
{
if(location[j] !=&quot;0&quot
stack.push(location[j]);
}

instead of

for(int j=0;j<losize;j++)
{
if(location[j] !=&quot;0&quot
stack.push(location[j]);
}

secondly don't use != in Strings.Use equals(<String>) method.
Thirdly your parameters might not be equal to your desired values.Check them.(location[j].equals(&quot;9&quot vice versa..) Salih Sipahi
Software Engineer.
City of Istanbul Turkey
ssipahi@yonbilgi.com

 

[ttea]

Hattusas

The problem is solved.

Thanks~~