对于字符串,您必须使用 equals 来比较它们,因为 == 只比较引用.
For Strings you have to use equals to compare them, because == only compares the references.
如果我将字符与 == 进行比较,它会给出预期的结果吗?
Does it give the expected result if I compare chars with == ?
我在stackoverflow上看到过类似的问题,例如
I have seen similar questions on stackoverflow, E.g.
但是,我还没有看到有人询问有关在字符上使用 == 的问题.
However, I haven't seen one that asks about using == on chars.
是的,char
和其他原始类型一样,你可以通过 ==
来比较它们.
Yes, char
is just like any other primitive type, you can just compare them by ==
.
您甚至可以将 char 直接与数字进行比较并在计算中使用它们,例如:
You can even compare char directly to numbers and use them in calculations eg:
public class Test {
public static void main(String[] args) {
System.out.println((int) 'a'); // cast char to int
System.out.println('a' == 97); // char is automatically promoted to int
System.out.println('a' + 1); // char is automatically promoted to int
System.out.println((char) 98); // cast int to char
}
}
将打印:
97
true
98
b
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