import java.util.HashMap;
import java.util.Map;
 
 
class VariableStore {
 
    private final Map<Class<?>, Map<String, Object>> containers = new HashMap<>();
 
    public <T> T getVariable(Class<T> clazz, String key) {
        Map<String,?> map = containers.get(clazz);
        if (map == null) {
            return null;
        }
        Object val = map.get(key);
        if (val == null) {
            return null;
        }
        return clazz.cast(val);
    }
 
    public void putVariable(String key, Object value) {
        if (value == null || key == null) {
            throw new IllegalArgumentException("Neither Key nor Value can be null: " + key + " -> " + value);
        }
        Class<?> clazz = value.getClass();
        Map<String, Object> map = containers.get(clazz);
        if (map == null) {
            map = new HashMap<>();
            containers.put(clazz, map);
        }
        map.put(key, value);
    }
 
    public static void main(String[] args) {
        VariableStore vs = new VariableStore();
        for (int i = 0; i < 10; i++) {
            vs.putVariable("" + i, new Integer(i));
            vs.putVariable("" + i, "" + i);
        }
 
        for (int i = 0; i < 10; i++) {
            Integer iv = vs.getVariable(Integer.class, "" + i);
            String sv = vs.getVariable(String.class, "" + i);
            System.out.printf("Got %s (%s)\n", iv, iv.getClass());
            System.out.printf("Got %s (%s)\n", sv, sv.getClass());
        }
 
 
    }
 
}
 

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