ListResourceBundle类的getContents()方法 (ListResourceBundle Class getContents() method)

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

  getContents()方法在java.util包中可用。

• getContents() method is used to return an enumeration of all the keys that exist in this ListResourceBundle and its superclass.

  getContents()方法用于返回此ListResourceBundle及其超类中存在的所有键的枚举。

• getContents() 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.

  getContents()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• getContents() method does not throw an exception at the time of returning an enumeration of elements.

  在返回元素枚举时， getContents()方法不会引发异常。

Syntax:

句法：

    public Enumeration getKeys();

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 the method is Enumeration, it gets an Enumeration of all the existing keys in this ListResourceBundle and its super bundle.

该方法的返回类型为Enumeration ，它获取此ListResourceBundle及其超级捆绑包中所有现有键的Enumeration。

Example:

例：

// Java program to demonstrate the example
// of Enumeration getKeys()  method of
// ListResourceBundle
import java.util.*;
// Instantiates a class that extends
// ListResourceBundle
class GetKey extends ListResourceBundle {// By using getContent() method is to
// get the contents in the form of
// 2D objects
protected Object[][] getContents() {return new Object[][] {{"10",
"C"
}, {"20",
"C++"
}, {"30",
"JAVA"
}, {"40",
"SFDC"
}, {"50",
"PHP"
}
};
}
}
public class Main {public static void main(String[] args) {// Instantiates an object of
// GetKeys
GetKey get_c = new GetKey();
// By using getKeys() method is
// return all the keys in the
// form of an Enumeration
System.out.println("get_c.getKeys(): ");
for (Enumeration en = get_c.getKeys(); en.hasMoreElements();)
System.out.println(en.nextElement());
}
}

Output

输出量

get_c.getKeys():
50
40
30
20
10

翻译自: https://www.includehelp.com/java/listresourcebundle-getkeys-method-with-example.aspx