GenericTest.java

public class GenericTest {
	public static void main(String[] args) {
		GenericTest test = new GenericTest();
		System.out.println(test.join("Hello,", "world"));
		System.out.println(test.join(1, 2));
		System.out.println(test.join("Hello", 99999));
	}
	
	public <T> String join(T obj1, T obj2){
		return obj1.toString() + obj2.toString();
	}
}