在Java中定义了类型后，同时初始化多个变量？ [英] Initialize multiple variables at the same time after a type has already been defined in Java?

问题描述

这里需要一些语法帮助。我已经尝试在已定义类型后重新初始化多个变量。例如，

Need a little bit of help with syntax here. I'm trying to re-initialize multiple variables after the type has already been defined. So for example

int bonus, sales, x, y = 50; 

这很好......但是我想稍后在其中一些变量中加入不同的值在我的程序中，但我收到语法错误。

This works fine... however I want to put a different value into some of those variables later on in my program, but I'm getting a syntax error.

bonus = 25，x = 38，sales = 38;

编译器说我需要

奖金和x的另一个分号。

有没有办法在一行代码中更改值？或者我必须在每个值之后加一个分号？

Is there a way to change the values in a single line of code? Or would I have to put a semicolon after each value??

推荐答案

我认为你很担心是<$的行为c $ c> int bonus，sales，x，y = 50; 。它将 y 初始化为 50 ，其余未初始化。

I think you are confused as to be behavior of int bonus, sales, x, y = 50;. It initializes y to 50 and leaves the rest uninitialized.

要将所有这些初始化为 50 ，您必须：

To initialize all of them to 50, you have to:

int bonus = 50, sales = 50, x = 50, y = 50;

然后您可以更改其值：

bonus = 25;
x = 38;
sales = 38;

// or compact
bonus = 25;   x = 38;   sales = 38;

// or to same value
bonus = x = sales = 42;

与您可以使用的 C 语言不同任何地方的逗号语法，在Java中你只能在声明变量时使用它，或者在中用于循环： for（i = 1，j = 2; i< 10; i ++，j + = 2）

Unlike the C language where you can use the comma syntax anywhere, in Java you can only use that when declaring the variables, or in a for loop: for (i=1, j=2; i < 10; i++, j+=2)

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