Y is my code not running?

#1

public void reverse(int k) throws Exception{
if(size==0){
throw new Exception(“empty ll”);
}
else if(size==1){
throw new Exception(“single node exists reverse not possible”);
}
else{
int len=size/k;
int left=0;
int right=k-1;
for(int i=0;i<len;i++){
while(left<right){
Node l=getNodeAt(left);
Node r=getNodeAt(right);
int temp=l.data;
l.data=r.data;
r.data=temp;
left++;
right–;
}
left=left+2;
right=left+(k-1);
}
}
}

#2

please share your entire code…save it on ide.codingblocks.com and share the link

#3

also in this ques it is easy to do by swapping the values but actually you have to swap the links

#4

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