[英]passing enums by ref in java
How can i pass enum parameter by reference in java? 如何在java中通过引用传递enum参数? Any solution?
有解决方案吗
Java is pass by value - always. Java始终是值得传递的。
You pass references, not objects. 您传递引用,而不是对象。 References are passed by value.
引用按值传递。
You can change the state of a mutable object that the reference points to in a function that it is passed into, but you cannot change the reference itself. 您可以在传入的函数中更改引用所指向的可变对象的状态,但不能更改引用本身。
In Java you cannot pass any parameters by reference. 在Java中,您无法通过引用传递任何参数。
The only workaround I can think of would be to create a wrapper class, and wrap an enum. 我能想到的唯一解决方法是创建一个包装类,并包装一个枚举。
public class EnumReference {
public YourEnumType ref;
}
And then you would use it like so: 然后你会像这样使用它:
public void someMethod(EnumReference reference) {
reference.ref = YourEnumType.Something;
}
Now, reference will contain a different value for your enum; 现在,引用将包含枚举的不同值; essentially mimicking pass-by-reference.
基本上模仿传递引用。
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