問題描述
我目前正在使用 Java 中的數據類型，如果我理解正確，類型 long 接受介于 -9,223,372,036,854,775,808 到 +9,223,372,036,854,775,807 之間的值.現在正如您在下面看到的，我創建了一個名為 testLong 的 long 變量，盡管當我插入 9223372036854775807 作為值時，我收到一條錯誤消息:
I am working with data types at the moment in Java, and if I have understood correctly the type long accepts a value between the ranges of -9,223,372,036,854,775,808 to +9,223,372,036,854,775,807. Now as you can see below, I have create a long variable called testLong, although when I insert 9223372036854775807 as the value, I get an error stating:
int 類型的字面量 9223372036854775807 超出范圍.
The literal 9223372036854775807 of the type int is out of range.
我不知道為什么它把 long 數據類型稱為 int.
I don't know why it is referring to the long data type as an int.
有人有什么想法嗎?
代碼:
char testChar = 01;
byte testByte = -128;
int testInt = -2147483648;
short testShort = -32768;
long testLong = 9223372036854775807;
float testFoat;
double testDouble = 4.940656458412;
boolean testBool = true;
推薦答案
在末尾加一個大寫的L:
long value = 9223372036854775807L;
否則，編譯器將嘗試將文字解析為 int，因此會出現錯誤消息
Otherwise, the compiler will try to parse the literal as an int, hence the error message
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