Show the run time error

Question

1.00/5 (2 votes)

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Runtime Error
Exception in thread main java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at Solution.validStackPermutation(Solution.java:16) at Runner.executeAndPrintOutput(Runner.java:61) at Runner.main(Runner.java:73)

What I have tried:

 while (!s.empty() && s.peek() == other.get(j)) {
                s.pop();
                j++;
            }
 
            if (j <=other.size() && s.peek() == other.get(j)) {
                return false;
            }
        }
 
        return true;
        
    }
}

Posted 28-Jun-23 8:20am

Shubham Verma Jun2023

Updated 28-Jun-23 10:05am

v2

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Dave Kreskowiak 28-Jun-23 14:24pm

Edit this post and ADD THE ERROR MESSAGE. Your also probably going to be asked for the rest of the code too.

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Patrice T · Answer 1 · 2023-06-28T10:05:00

Java

            while (!s.empty() && s.peek() == other.get(j)) { // if condition is never met, you quit loop when s is empty
                s.pop();
                j++;
            }
 
            if (j <=other.size() && s.peek() == other.get(j)) { // how do you know that s is not empty at this point ?
                return false;
            }
        }
 
        return true;
        
    }
}