java - 在for语句的初始化中可以初始化多少个变量？

Question

一个简单的 for 语句是:

 for(int i = 0/*A Optional*/; i < 10/*B Optional*/; i++/*C Optional*/) {
 }

现在for语句的初始化代码(A)中可以初始化多少个变量？ 另外，我将如何在 for 语句的初始化代码 (A) 中初始化这些变量？

Answer 1

想写多少就写多少，但声明仅限于同一类型。 (对于初始化，请参阅下面的扩展和 Wugs 的回答。)

for (int a = 1, b = 2, c = 3 ; ; ) {
    break;
}

---

(可选)ForInit部分可以是:

1. If the ForInit code is a list of statement expressions (§14.8), the expressions are evaluated in sequence from left to right; their values, if any, are discarded.

2. If the ForInit code is a local variable declaration, it is executed as if it were a local variable declaration statement (§14.4) appearing in a block.

3. If the ForInit part is not present, no action is taken.

上面带有声明的示例代码的格式为 for(LocalVariableDeclaration;;)。