Find the syntax errors in the definition of the following two classes:

a. public class AA

{

private int x; private int y; public void print ()

{

System . out . println (x + " " + y);

}

public int sum ()

{

return x + y;

}

public AA ()

{

x = 0;

y = 0;

}

public int AA( int a, int b)

{

x = a;

y = b;

}

}