Java-使用另一个文件中的变量
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Java- use a variable from another file
提问by user2195411
How can I use a variable from another file? I am writing automation tests (Selenium and TestNG). I want to store some data variables and xpaths in a separate file (secondFile.java)
如何使用另一个文件中的变量？我正在编写自动化测试（Selenium 和 TestNG）。我想在一个单独的文件 (secondFile.java) 中存储一些数据变量和 xpath
Master File:
主文件：
import secondFile.help;
public class TicketAdminTestSuite extends something {
void printStuff(){
System.out.println(bar);
}
}
==============================================
==============================================
Helper file (name: help.java):
帮助文件（名称：help.java）：
public class help {
public static final String bar = "blah";
}
回答by robin
There are two severe errors in your code:
- the helper file name must be the same as the class name
- the import in the master file must import the helper file with the full package name (I assume the files are in the same package)
您的代码中有两个严重错误：
- 帮助文件名必须与类名相同
- 主文件中的导入必须导入具有完整包名的帮助文件（我假设文件在同一个包中）
// master file TicketAdminTestSuite.java
import Help;
public class TicketAdminTestSuite extends something {
void printStuff(){
System.out.println(Help.bar);
}
}
// help file Help.java
public class Help {
public static final String bar = "blah";
}
回答by Eugene Loy
Simpliest way to do this is to import your helpclass and access it like:
最简单的方法是导入您的help类并像这样访问它：
import help;
...
String test = help.bar;
... or you can use static import:
...或者您可以使用静态导入：
import static help.bar;
...
String test = bar;
回答by Sagar Pudi
public classname should match with its file name.
public class名称应与其文件名匹配。
eg:
例如：
First.java
首先.java
import demo.Second;
public class First{
Second second=new Second();
void printStuff(){
System.out.println(second.getBar());
}
}
Second.java
第二个.java
package demo;
public class Second{
String bar="blah";
public String getBar(){
return this.bar;
}
}
回答by Tilion
Just write help.bar:
只需写 help.bar ：
void printStuff(){
System.out.println(help.bar);
But this example is a bit confusing because the public class must be called the same as the .java file. And if you made a second class in the secoundfile you wouldn't be able to access it from your first file. This would be a better example: import secondFile;
但是这个例子有点混乱，因为公共类必须和 .java 文件一样被调用。如果您在 secoundfile 中创建了第二个类，您将无法从您的第一个文件访问它。这将是一个更好的例子： import secondFile;
public class TicketAdminTestSuite extends something {
void printStuff(){
System.out.println(secondFile.BAR);
}
}
And the second file is made like this
第二个文件是这样制作的
public class secondFile {
public static final String BAR = "blah";
}
回答by Sapikelio
Use a getter method.
使用 getter 方法。
public class help {
public static final String bar = "blah";
public String getBar(){
return this.bar;
}
}
And then use it on your code.
然后在您的代码中使用它。
import secondFile.help;
public class TicketAdminTestSuite extends something {
Help help = new Help();
void printStuff(){
System.out.println(help.getBar());
}
}
