ListResourceBundle類的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及其超類中存在的所有鍵的枚舉。

• 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()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

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

  在返回元素枚舉時， getContents()方法不會引發異常。

Syntax:

句法：

    public Enumeration getKeys();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

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.

該方法的返回類型為Enumeration ，它獲取此ListResourceBundle及其超級捆綁包中所有現有鍵的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

輸出量

get_c.getKeys(): 
50
40
30
20
10

翻譯自: https://www.includehelp.com/java/listresourcebundle-getkeys-method-with-example.aspx