Cần chú ý rằng interface khi khai báo trong class thì có thể là default, public, private, protected. Không giống khi ta khai báo 1 interface độc lập thì chỉ có thể là public
import java.util.*;
class Test
{
interface Yes
{
void show();
}
}
class Testing implements Test.Yes
{
public void show()
{
System.out.println("show method of interface");
}
}
class A
{
public static void main(String[] args)
{
Test.Yes obj;
Testing t = new Testing();
obj=t;
obj.show();
}
}
import java.util.*;
class Test
{
protected interface Yes
{
void show();
}
}
class Testing implements Test.Yes
{
public void show()
{
System.out.println("show method of interface");
}
}
class A
{
public static void main(String[] args)
{
Test.Yes obj;
Testing t = new Testing();
obj=t;
obj.show();
}
}
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