JAVA认证历年真题：310-025精选题（11）

会计考友

（11），具体内容如下：  
31. Given this skeleton of a class currently under construction:
* Y% `% n" M1 o' u6 Gpublic class Example {
int x, y;
public Example(int a){
* E7 b3 n" }/ I5 E//lots of complex computation
x = a;
}
: J) P- U* ^6 ^% z, upublic Example(int a, int b) {
/*do everything the same as single argument version of constructor including assignment x = a */
y = b;
6 H& S; L8 P' X  D( h! [- r}
}
What is the most concise way to code the "do everything..." part of the constructor taking two arguments?
Answer:
* w, c. G+ L- L& V) Dthis(a);
, X! X7 [# D+ K32. Given this skeleton of a class currently under construction:
9 L5 o* d$ Z1 z. t& T( Rpublic class Example {
int x, y;
public Example(int a, int b){
% i4 [: _# j! {- t) a7 a, N8 R0 w//lots of complex computation
) `# b* Z& B0 t3 Wx = a;
}
public Example(int a, int b, long c) {
4 }' H( G  ]7 F" |$ T# T% F/*do everything the same as the two argument version of constructor including assignment x = a */
y = b;
}
}
( N! P: a7 |! N4 F$ QWhat is the most concise way to code the "do everything..." part of the constructor taking two arguments?
7 P& u* P' \5 t5 t2 g/ Q' FAnswer:
. M5 i; A. t  D; Q$ y# gthis(a, b);
Warning! A similar question will appear with at least two classes, then it is super("arguments"); that you should use.
33. Which correctly create a two dimensional array of integers?
A. int a [][] = new int [10,10];
B. int a [10][10] = new int [][];
C. int a [][] = new int [10][10];
D. int []a[] = new int [10][10];
- Y- I9 T. X- o  dE. int [][]a = new int [10][10];
CDE.