英文:
What's the meaning of assigning one variable with 2 values in Java
问题
我在Java方面还很新，今天看到了这段代码，但不明白它的含义。它将一个变量赋值为2个值，那么变量'actual'的值是什么？
Token actual = new Token(MODULE, 0, 0, ""), expected;
英文:
I am new in Java, I saw this code today and don't get what it means. It is assigning a variable with 2 values, so what is the value of this variable 'actual'?
Token actual=new Token(MODULE, 0, 0, ""), expected;
答案1
得分: 4
它创建了两个变量：actual，被赋值为new Token(MODULE, 0, 0, "")；以及expected，未被赋值。
英文:
It creates two variables: actual, which is assigned new Token(MODULE, 0, 0, ""); and expected, which is left unassigned.
答案2
得分: 3
变量声明的基本语法实际上是：
<类型> <名称> [ = <值> ] [ , <名称> [ = <值> ] ]...
例如，以下都是有效的：
int x; // 声明x，不赋值
int x = 5; // 声明x，并初始化为5
int x, y; // 声明x和y，不赋值
int x = 5, y = 7; // 声明x和y，并分别初始化为5和7
int x, y = 7; // 声明x和y，初始化y，不赋值x
int x = 5, y; // 声明x和y，初始化x，不赋值y
问题中的代码声明了两个变量，分别命名为actual和expected，初始化了actual，并未赋值expected。
英文:
The base syntax of a variable declaration is actually:
<type> <name> [ = <value> ] [ , <name> [ = <value> ] ]...
E.g. these are all valid:
int x; // declares x, leaving it unassigned
int x = 5; // declares x, initializing it
int x, y; // declares x and y, leaving both unassigned
int x = 5, y = 7; // declares x and y, initializing both
int x, y = 7; // declares x and y, initializing y, leaving x unassigned
int x = 5, y; // declares x and y, initializing x, leaving y unassigned
The code in the question declares 2 variables named actual and expected, initializes actual, and leaves expected unassigned.
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