File => A.java 
'
package demoA;
import demoB.B;
public class A {
        [code][/code]private String x;
        private String Greet(B b, int c) {
                b.ChangeValue(x, c);
                return x;
        }
}
'

File => B.java
'
package demoB;
public class B {
        public static void ChangeValue(String x, int c) {
                if (c > 5)
                        x = "Not even close so far ...";
        }
}
'