【简答题】s Long March exhibit The Shanghai History Museum is putting on exhibition to remember the Long March(长征) which took place 75 years ago. More than 220 photos and 40 other things are on show. All...
【简答题】有如下代码,下面的哪个项可以插入在指定位置上“//处”()。 public class Abcd{ public long sum(long a,long b){return a+b;} // }A. public int sum(int a,int b){return a+b;} B. public int sum(long a,long b){return 0;} C. abstr...
【多选题】Given the following code, which method declarations, when inserted at the indicated position, will not cause the program to fail compilation?() public class Qdd1f { public long sum(long a, long b)...
A.
public int sum(int a, int b) { return a + b; }
B.
public int sum(long a, long b) { return 0; }
C.
abstract int sum();
D.
private long sum(long a, long b) { return a + b; }
【简答题】下列程序中: class AClass{ private long val; public AClass(long v){val=v;} public Static void main(String args[]){ AClass x=new AClass(10L); AClass y=new AClass(10L); AClass z=y; long a=10L; int b=10; } } 表...