多项选择题
public class X {
public X aMethod() { return this;}
}
public class Y extends X {
}
Which two methods can be added to the definition of class Y?()
A. public void aMethod() {}
B. private void aMethod() {}
C. public void aMethod(String s) {}
D. private Y aMethod() { return null; }
E. public X aMethod() { return new Y(); }
相关考题
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单项选择题
Whichfragmentisanexampleofinappropriateuseofassertions?()
A. assert (!(map.contains(x))); map.add(x);
B. if (x > 0){}else { assert (x==0); }
C. public void aMethod(int x) { assert (x > 0); }
D. assert (invariantCondition()); return retval;
E. switch (x) { case 1: break; case 2: creak; default: assert (x == 0); -
单项选择题
int i = 1,j = 10; do{ if (i>j) { continue; } j--; } while (++i <6); System.out.println(“i = “ +i+” and j = “+j); What is the result?()
A. i = 6 and j = 5
B. i = 5 and j = 5
C. i = 6 and j = 4
D. i = 5 and j = 6
E. i = 6 and j = 6 -
单项选择题
class Super { public int i = 0; public Super(String text) { i = 1; } } public class Sub extends Super { public Sub(String text) { i = 2; } public static void main(String args[]) { Sub sub = new Sub(“Hello”); System.out.println(sub.i); } } What is the result?()
A. 0
B. 1
C. 2
D. Compilation fails.
