public class A {
private B b;
public void setB(B b){
	this.b=b;
}
/*public void setBB(){
	b=new B();
}*/
}

class B{
	String bab;
	public B(String ba){
		ba=bab;
	}


public static void main(String args[]){
	A classA=new A();
	B classB=new B("hello");
	classA.setB(classB);
	}
}