soft cache - Ran with -Xmx128M

gistfile1.java

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.RemovalListener;
import com.google.common.cache.RemovalNotification;

/**
 */
public class Testje {

    public static void main(String[] args) {
        CacheBuilder<String, Integer> cacheBuilder = CacheBuilder.newBuilder().softValues().removalListener(new RemovalListener<String, Integer>() {
            @Override
            public void onRemoval(RemovalNotification<String, Integer> notification) {
                System.out.println("About to remove: " + notification.getKey());
            }
        });

        Cache<String, Integer> cache = cacheBuilder.build();
        for (int i = 0; i < Integer.MAX_VALUE; i++) {
            cache.put("key" + i, i);
        }
    }

}