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Exercise2.java
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75 lines (56 loc) · 1.2 KB
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abstract class Noinstance{
Noinstance(){
System.out.println("abstr constr");
}
public abstract void meth();
public abstract void eth();
public void try4(){
}
}
interface Test{
int name = 5;
void func();
}
interface Test2 extends Test{
void destroy();
}
class Waveform implements Test{
public static String name = "name";
public String toString(){
String d = "Wave";
return d;
}
@Override
public void func(){
System.out.println("func()");
}
}
class Troy extends Waveform implements Test2{
@Override
public void destroy(){
func();
}
}
public class Exercise2 extends Noinstance{
@Override
public void meth() {
System.out.println("hello meth");
}
@Override
public void eth(){
System.out.println("hello eth");
}
static void upcast(Test g){
g.func();
}
public static void main(String[] args){
Waveform w = new Waveform();
Exercise2 ex = new Exercise2();
upcast(w);
ex.meth();
ex.eth();
System.out.println(w);
}
// Error; cant instantiate class
// Noinstance none = Noinstance();
}