/*class A*/
public class A {
	public Object obj;

	public A(B b) {
		obj  = b;
	}
}

/*class B*/
public class B {
	int example = 1;

	public int getValue() {
		return example;
	}
}

/*main*/
public class Example {
	public static void main(String args[]) {
		A a = new A(new B());
		a.obj.getValue();
	}
}

/*compiler:
 * javac Example.java 
 * Example.java:4: cannot find symbol
 * symbol  : method getValue()
 * location: class java.lang.Object
 *               a.obj.getValue();
 *                    ^
 *  1 error
 */