快来看看这道题该选什么？

[wulingdongliu]

Which of the following statements about declaration are true?

A. Declaration of primitive types such as boolean, byte and so on does not allocate memory space for the variable.
B. Declaration of primitive types such as boolean, byte and so on allocates memory space for the variable.
C. Declaration of nonprimitive types such as String, Vector and so on does not allocate memory space for the object.
D. Declaration of nonprimitive types such as String, Vector and so on allocates memory space for the object.

[andytu]

I think D is true.Because the boolean variable does not allocate memory space.and all the nonprimitive type allocate memory space for the object and the reference.

[wulingdongliu]

只有这一个答案吗？

[jinhuaxing]

BC

[flyspider]

B

[njbxc]

我觉得没有一个对的，class-level中的声明是会分配内存的，可是local的不会！

[redv]

B & C

简单类型赋于初始值，如boolean初始值为false

而像Vector的只是一个指向null的“指针”般的东西。

[zi_feng]

BC

[ktyl2000]

I thing C is true;

[tonypotter]

of cause
b & c is correct

[lijing725]

b d

[willowfly]

shi bu shi b a

[gmleon]

B & C are correct answers.

AClass aClass; - No memory allocated.

aClass = new AClass(); - momory actually allocated.

[tzh127]

I prefer b & c. Because Java does not support the variable string,so you must give a definition of the length of the string before you use this string.that is
to say you must allocate the memory space of the nonprimitive types .