Java Properties entrySet()用法及代码示例

Properties类的entrySet()方法用于获取此Properties映射的Set视图。

用法:

public Set<Map.Entry> entrySet()

参数：此方法不接受任何参数。

返回值：此方法返回此Properties对象的映射的Set视图。

以下示例程序旨在说明entrySet()方法：

示例1:

// Java program to demonstrate 
// entrySet() method. 
  
import java.util.*; 
  
public class GFG { 
  
    // Main method 
    public static void main(String[] args) 
    { 
  
        // Create a properties and add some values 
        Properties properties = new Properties(); 
        properties.put("Pen", 10); 
        properties.put("Book", 500); 
        properties.put("Clothes", 400); 
        properties.put("Mobile", 5000); 
  
        // Print Properties details 
        System.out.println("Current Properties: "
                           + properties.toString()); 
  
        // Using entrySet() to get the set view 
        System.out.println("The set is: "
                           + properties.entrySet()); 
    } 
}

输出：

Current Properties: {Book=500, Mobile=5000, Pen=10, Clothes=400}
The set is: [Book=500, Mobile=5000, Pen=10, Clothes=400]

示例2:

// Java program to demonstrate 
// entrySet() method. 
  
import java.util.*; 
  
public class GFG { 
  
    // Main method 
    public static void main(String[] args) 
    { 
  
        // Create a properties and add some values 
        Properties properties = new Properties(); 
  
        properties.put(1, "100RS"); 
        properties.put(2, "500RS"); 
        properties.put(3, "1000RS"); 
  
        // print Properties details 
        System.out.println("Current Properties: "
                           + properties.toString()); 
  
        // Using entrySet() to get the set view 
        System.out.println("The set is: "
                           + properties.entrySet()); 
    } 
}

输出：

Current Properties: {3=1000RS, 2=500RS, 1=100RS}
The set is: [3=1000RS, 2=500RS, 1=100RS]

参考：https://docs.oracle.com/javase/9/docs/api/java/util/Properties.html#entrySet–

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注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 Properties entrySet() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。