ReturnTypeOverload.java

public class ReturnTypeOverload {

	public static void main(String[] args) {
		Long lv = getValue();
		System.out.println(lv);

		String sv = getValue();
		System.out.println(sv);
	}

	// public static Long get() {
	// return 30L;
	// }
	//
	// public static String get() {
	// return "33";
	// }

	@SuppressWarnings("unchecked")
	public static <T> T getValue(T... dontset) {
		Class<?> type = dontset.getClass().getComponentType();
		if (Long.class.equals(type)) {
			return (T) Long.valueOf("30");
		}
		if (String.class.equals(type)) {
			return (T) "33";
		}
		throw new IllegalStateException();
	}
}