Structural -- Adapter

--- Adapter.java ---

package structural.adapter;

public class Adapter implements Target {

private Adaptee adaptee;

public Adapter(Adaptee adaptee) {

this.adaptee = adaptee;
}

public void sampleOperation2() {

}

public void sampleOperation1() {
adaptee.sampleOperation1();
}

}

--- Target.java ---

package structural.adapter;

public interface Target {

void sampleOperation1();

void sampleOperation2();

}

--- Adaptee.java ---

package structural.adapter;

public class Adaptee {

public void sampleOperation1() {

}
}