ResourceBundle类keySet()方法 (ResourceBundle Class keySet() method)

• keySet() method is available in java.util package.

  keySet()方法在java.util包中可用。

• keySet() method is used to get all the existing keys from this ResourceBundle and its super bundles to be viewed in a Set.

  keySet()方法用于从此ResourceBundle及其超级捆绑包中获取所有现有密钥，以在Set中进行查看。

• keySet() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  keySet()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• keySet() method does not throw an exception at the time of getting a key set.

  在获取密钥集时， keySet()方法不会引发异常。

Syntax:

句法：

    public Set keySet();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of this method is Set, it returns Set view of all the existing keys in this ResourceBundle and its parent bundles.

此方法的返回类型为Set ，它返回此ResourceBundle及其父捆绑中所有现有键的Set视图。

Example:

例：

// Java program to demonstrate the example 
// of Set keySet() method of ResourceBundle
import java.util.*;
public class KeySetOfResourceBundle {
public static void main(String[] args) {
// Instantiates ResourceBundle with
// some locale
ResourceBundle rb = ResourceBundle.getBundle("IncludeHelp...", Locale.JAPAN);
// By using keySet() method is to
// return the key set exists in
// this rb or any of its parents
Set s = rb.keySet();
System.out.println("rb.keySet(): " + s);
}
}

Output

输出量

rb.keySet(): [C,C++,JAVA,PHP]

翻译自: https://www.includehelp.com/java/resourcebundle-keyset-method-with-example.aspx