英文:
Java make one method return an int OR a string and require a String and a String or an int and a String
问题
例如,如果我有这个方法:
public static String exampleMethod(String a, String b) {
}
是否可能创建一个相同名称的类似方法,如下所示:
public static String exampleMethod(String a, int b) {
}
而且 exampleMethod
是否可以返回 int
或者 string
?
英文:
For example if I had the method:
public static String exampleMethod(String a, String b) {
}
Is it possible to make the same method with the same name like this:
public static String exampleMethod(String a, int b) {
}
And is it possible for exampleMethod to return either a int or a string?
答案1
得分: 1
- 是的,这被称为方法重载。
- 不,你不能从同一个方法中返回不同的返回类型。你能做的最好的方式是同时返回它们,并让调用者检查你返回了哪个。例如,创建一个元组类来存储字符串和整数:Tuple<String, Integer>,然后从你的方法中返回它。
英文:
- Yes, it's called method overloading.
- No, you cannot return different return types from the same method. The best you can do is to return both and have the caller check which you've returned. i.e. create a tuple class to store the String and Integer: Tuple<String, Integer>, and return it from your method.
答案2
得分: 0
是的,这被称为方法重载。一个方法只能有一个返回类型,但通过重载,每个版本的方法可以有自己的返回类型。
英文:
Yes, it's called method overloading. A method can only have one return type, but by overloading, each version of the method can have its own return type.
答案3
得分: 0
这被称为方法重载。
如果您希望您的方法接受两个字符串或一个字符串和一个整数:
public static String exampleMethod(String a, int b) {
}
如果您希望它接受两个字符串:
public static String exampleMethod(String a, String b) {
}
等等...
不幸的是,一个方法不能有两个返回类型,但在重载时,您可以更改返回类型。例如:
public static int exampleMethod(String a, int b) {
}
英文:
This is called Method Overloading.
If you want your method to accept two strings or a string and an int:
public static String exampleMethod(String a, int b) {
}
If you want it to accept two strings:
public static String exampleMethod(String a, String b) {
}
etc...
Unfortunately, one method cannot have two return types but when overloading, you can change the return type. For example:
public static int exampleMethod(String a, int b) {
}
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