Pairs in java

General Questions
#1

Hey everyone,

I’m wondering why I’m getting an error when I copy-paste the code on the USACO guide chapter for pairs and tuples.

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image756×293 12.8 KB

Could someone help me out?

#2

Either remove “static” or nest the entire Pair class inside Main. More info here.

#3

I think in most IDEs, if you put your cursor over the red line, it tells you what the problem is. So many try that, then make a post here?

#4

This is what I get:

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image778×428 17 KB

Thanks!

#5

You need to put the pair class inside the Main class.

It should look like this:

public class Main {
    static class Pair<K, V> {
    
    } 
    public static void main(String[] args) {
    
    }
}
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#6

You can put it outside the main class, you just have to remove the static modifier.

1 Like