阿摩線上測驗
Given:
1. public class TestString1{
2. public static void main(String[] args){
3. String str = "420";
4. str += 42;
5. System.out.print(str);
6. }
7. }
What is the output?
(A) 42
(B) 420
(C) 462
(D) 42042
(E) Compilation fails.
F. An exception is thrown at runtime.
答案：登入後查看
統計： A(11), B(33), C(44), D(422), E(42) #1157007
統計： A(11), B(33), C(44), D(422), E(42) #1157007
詳解 (共 2 筆)
Joe Chen
#1263831
A += B => A = A + B
5
1
Joe Chen
#1263841
Given:
1. public class TestString1{
2. public static void main(String[] args){
3. String str = "420";
4. str += 42;
5. System.out.print(str);
6. }
7. }
What is the output?
(A) 42
(B) 420
(C) 462
(D) 42042
(E) Compilation fails.
(F). An exception is thrown at runtime.
1. public class TestString1{
2. public static void main(String[] args){
3. String str = "420";
4. str += 42;
5. System.out.print(str);
6. }
7. }
What is the output?
(A) 42
(B) 420
(C) 462
(D) 42042
(E) Compilation fails.
(F). An exception is thrown at runtime.
4
0