java 枚举不能解决？爪哇
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Enum can not be resolved? Java
提问by CursedChico
I have 2 classed at different pages.
我有 2 个分类在不同的页面。
The object class:
对象类：
public class Sensor {
Type type;
public static enum Type
{
PROX,SONAR,INF,CAMERA,TEMP;
}
public Sensor(Type type)
{
this.type=type;
}
public void TellIt()
{
switch(type)
{
case PROX:
System.out.println("The type of sensor is Proximity");
break;
case SONAR:
System.out.println("The type of sensor is Sonar");
break;
case INF:
System.out.println("The type of sensor is Infrared");
break;
case CAMERA:
System.out.println("The type of sensor is Camera");
break;
case TEMP:
System.out.println("The type of sensor is Temperature");
break;
}
}
public static void main(String[] args)
{
Sensor sun=new Sensor(Type.CAMERA);
sun.TellIt();
}
}
Main class:
主类：
import Sensor.Type;
public class MainClass {
public static void main(String[] args)
{
Sensor sun=new Sensor(Type.SONAR);
sun.TellIt();
}
Errors are two, one is Type can not be resolved other is cant not import. What can i do? I first time used enums but you see.
错误有两种，一种是类型无法解析，另一种是无法导入。我能做什么？我第一次使用枚举，但你看。
回答by Reimeus
enumsare required to be declared in a package for importstatements to work, i.e. importing enumsfrom classes in package-private (default package) classes is not possible. Move the enum to a package
enums需要在包中import声明才能使语句起作用，即enums无法从包私有（默认包）类中的类导入。将枚举移动到包
import static my.package.Sensor.Type;
...
Sensor sun = new Sensor(Type.SONAR);
Alternatively you can use the fully qualified enum
或者，您可以使用完全限定的 enum
Sensor sun = new Sensor(Sensor.Type.SONAR);
without the import statement
没有导入语句
回答by Veera
For static way give proper package structure in the static import statement
对于静态方式，在静态导入语句中给出适当的包结构
import static org.test.util.Sensor.Type;
import org.test.util.Sensor;
public class MainClass {
public static void main(String[] args) {
Sensor sun = new Sensor(Type.SONAR);
sun.TellIt();
}
}
回答by ThePoltergeist
The static keyword has no effect on enum. Either use the outer class reference or create the enum in its own file.
static 关键字对枚举没有影响。使用外部类引用或在其自己的文件中创建枚举。
