不知道有關使用Java

Question

Possible Duplicate:
Uninitialized variables and members in Java
Why are local variables not initialized in Java?

在Java變量的變量默認初始化有默認值，對不對？即使數組也是由編譯器初始化的。
所以我不能瞭解以下內容：

int c; 
for(int i = 0; i < 10; i++){ 
    c = i + 5; 
} 
System.out.println("Result = "+c); 

爲什麼我得到一個編譯錯誤：

The local variable c may not have been initialized

是不是c由編譯器初始化爲0默認？
那麼，爲什麼我會得到這個錯誤，爲什麼錯誤消失，如果我明確地做int c = 0？

Answer 1

沒有局部變量必須進行初始化，類字段變量的缺省值是

Local variables are slightly different; the compiler never assigns a default value to an uninitialized local variable. If you cannot initialize your local variable where it is declared, make sure to assign it a value before you attempt to use it. Accessing an uninitialized local variable will result in a compile-time error [...]

Answer 2

Beucase forloop是有條件的循環。並根據編譯器c可能沒有初始化，如果沒有進入該條件循環