PrettyPrintTreeMap.java

package me.xiaopan.sketch.cache.recycle;

import java.util.TreeMap;

class PrettyPrintTreeMap<K, V> extends TreeMap<K, V> {
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("( ");
        for (Entry<K, V> entry : entrySet()) {
            sb.append('{').append(entry.getKey()).append(':').append(entry.getValue()).append("}, ");
        }
        if (!isEmpty()) {
            sb.replace(sb.length() - 2, sb.length(), "");
        }
        return sb.append(" )").toString();
    }
}