Java Generics

GenericKVStore.java

import java.util.HashMap;
import java.util.Map;


public class Driver {

	static Map<String, Object> KeyValueStore = new HashMap<String, Object>();
	
	public static void main(String[] args) throws Exception {

		Driver.KeyValueStore.put("testInt", 5);
		Driver.KeyValueStore.put("testString", "hello");
		
		String s = getValue(String.class, "testString");
		int i = getValue(Integer.class, "testInt");
		
		System.out.printf("%s, %d", s, i);
	}
	
	public static <T> T getValue(Class<T> type, String key) throws ClassCastException {

		Object value = Driver.KeyValueStore.get(key);
		return type.cast(value);
	}
}