LruCache Sample code

TestLruCache

package com.jayjaylab.android.test.plainjava;

import android.support.v4.util.LruCache;
import android.util.Log;

/**
 * Created by jayjay on 2016. 8. 6..
 */
public class TestLruCache {
    static final String TAG = TestLruCache.class.getSimpleName();
    static final int CACHE_SIZE = 50;

    public static void test() {
        String msg1 = "Caching or hoardin";
        String msg2 = "A cache or hoard";
        String msg3 = "Treasure trove";
        String msg4 = "Geocaching, an out";
        String msg5 = "Bear cache, a bear-safe";

        Log.d(TAG, "length(msg1 + msg2 + msg3) : " + (msg1.length() + msg2.length()
                + msg3.length()));
        Log.d(TAG, "length(msg4) : " + msg4.length());

        LruCache<Integer, String> lruCache = new LruCache<Integer, String>(CACHE_SIZE) {
            @Override
            protected int sizeOf(Integer key, String value) {
                return value.length();
            }
        };

        lruCache.put(msg1.hashCode(), msg1);
        lruCache.put(msg2.hashCode(), msg2);
        lruCache.put(msg3.hashCode(), msg3);
        showSnapshot(lruCache);

        lruCache.put(msg4.hashCode(), msg4);
        showSnapshot(lruCache);

        Log.d(TAG, "from cache : " + lruCache.get(msg1.hashCode()));
        Log.d(TAG, "from cache : " + lruCache.get(msg2.hashCode()));

        lruCache.put(msg5.hashCode(), msg5);
        showSnapshot(lruCache);
    }

    static void showSnapshot(LruCache<?, ?> lruCache) {
        Log.d(TAG, "createCount : " + lruCache.createCount() +
                ", evictionCount : " + lruCache.evictionCount() +
                ", hitCount : " + lruCache.hitCount() +
                ", maxSize : " + lruCache.maxSize() +
                ", missCount : " + lruCache.missCount() +
                ", putCount : " + lruCache.putCount());
        Log.d(TAG, "snapshot : " + lruCache.snapshot());
    }
}