public int evaluate() {
if (root == null) {
return -100000;
}
return evaluateHelper(root); (error)
}
private int evaluateHelper(MyBinaryTreeNode rt) {
if (rt.left == null) {
return Integer.parseInt(rt.data.toString()); (error)
}
switch (rt.data.toString()) {
case "+":
return evaluateHelper(rt.left) + evaluateHelper(rt.right);
case "-":
return evaluateHelper(rt.left) - evaluateHelper(rt.right);
case "/":
return evaluateHelper(rt.left) / evaluateHelper(rt.right);
case "*":
return evaluateHelper(rt.left) * evaluateHelper(rt.right);
case "%":
return evaluateHelper(rt.left) % evaluateHelper(rt.right);
default:
return -100000;
}
}
snowwizard 0 Newbie Poster
rproffitt 2,662 "Nothing to see here." Moderator
Is there a question that needs asking?
snowwizard commented: how do i fix this problem +0
JamesCherrill 4,733 Most Valuable Poster Team Colleague Featured Poster
It looks like whatever is inrt.data at line 14 is not a valid string representation of an integer.
But since you don't show that data there's nothing more anyone can say.
You could printrt.data just before calling parseInt to see what values you are processing
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