如何在TreeMap中比较两个值？-HowtocomparetwovaluesinTreeMap?

3  

Well you can do it like that:

那么你可以这样做:

        TreeMap tree=new TreeMap<>();          
        tree.put(1,5);
        tree.put(2,6);
        tree.put(3,4);
        tree.put(4,4);   

        Entry entry=tree.firstEntry();
        int c=0;
        while(tree.higherEntry(entry.getKey())!=null) {
            if(entry.getValue()>tree.higherEntry(entry.getKey()).getValue())
                c++;
            entry=tree.higherEntry(entry.getKey());
        }

Using the higherEntry, higherKey etc.

使用higherEntry,higherKey等。

By the way in your example you will get an ArrayIndexOutOFBound I think because of a[i + 1]

在你的例子中,你会得到一个ArrayIndexOutOFBound我认为因为[i + 1]