多項選擇題

Which statements concerning the relationships between the following classes are true？（）
class Foo { int num；
Baz comp = new Baz（）；
}
class Bar { boolean flag；
}
class Baz extends Foo {
Bar thing = new Bar（）；
double limit；
}

A.A Bar is a Baz.
B.A Foo has a Bar.
C.A Baz is a Foo.
D.A Foo is a Baz.
E.A Baz has a Bar.

你可能感興趣的試題

Given two collection objects referenced by col1 and col2，which of these statements are true？（）

A.The operation col1.retainAll（col2） will not modify the col1 object.
B.The operation col1.removeAll（col2） will not modify the col2 object.
C.The operation col1.addAll（col2） will return a new collection object， containing elements from both col1 and col2.
D.The operation col1.containsAll（Col2） will not modify the col1 object.

多項選擇題

Which statements concerning the following code are true？（）
class a {
public a（） {}
public a（int i） { this（）； }
}
class b extends a {
public boolean b（String msg） { return false； }
}
class c extends b
{ private c（） { super（）； }
public c（String msg） { this（）； }
public c（int i） {}
}

A.The code will fail to compile.
B.The constructor in a that takes an int as an argument will never be called as a result of constructing an object of class b or c.
C.Class c has three constructors.
D.Objects of class b cannot be constructed.
E.At most one of the constructors of each class is called as a result of constructing an object of class c.

Which statements concerning the relationships between the following classes are true？（） class Foo { int num； Baz comp = new Baz（）； } class Bar { boolean flag； } class Baz extends Foo { Bar thing = new Bar（）； double limit； }

你可能感興趣的試題

Given two collection objects referenced by col1 and col2，which of these statements are true？（）

Which statements concerning the relationships between the following classes are true？（）
class Foo { int num；
Baz comp = new Baz（）；
}
class Bar { boolean flag；
}
class Baz extends Foo {
Bar thing = new Bar（）；
double limit；
}

Given two collection objects referenced by col1 and col2，which of these statements are true？（）