Java Properties equals(value)用法及代碼示例

Properties類的equals(value)方法用於檢查兩個屬性之間的相等性。它驗證作為參數傳遞的一個屬性對象的元素是否等於此屬性的元素。

用法:

public boolean equals(Object value)

參數：此方法接受此Properties類型的參數值，表示要使用此映射檢查其相等性的映射。

返回值：此方法返回一個布爾值，說明兩個對象的屬性是否相等。

以下示例程序旨在說明equals(value)方法：

示例1:

// Java program to demonstrate 
// equals(value) 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("Properties 1: "
                           + properties.toString()); 
  
        // Create another properties and add some values 
        Properties properties1 = new Properties(); 
        properties1.put("Pen", 10); 
        properties1.put("Book", 500); 
        properties1.put("Clothes", 400); 
        properties1.put("Mobile", 5000); 
  
        // Print Properties details 
        System.out.println("Properties 2: "
                           + properties1.toString()); 
  
        // Checking the equality 
        System.out.println("Are both properties equal: "
                           + properties.equals(properties1)); 
    } 
}

輸出：

Properties 1: {Book=500, Mobile=5000, Pen=10, Clothes=400}
Properties 2: {Book=500, Mobile=5000, Pen=10, Clothes=400}
Are both properties equal: true

示例2:

// Java program to demonstrate 
// equals(value) 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()); 
  
        // Create another properties and add some values 
        Properties properties1 = new Properties(); 
        properties1.put("Pen", 10); 
        properties1.put("Book", 500); 
        properties1.put("Clothes", 400); 
        properties1.put("Mobile", 5000); 
  
        // Print Properties details 
        System.out.println("Properties 2: "
                           + properties1.toString()); 
  
        // Checking the equality 
        System.out.println("Are both properties equal: "
                           + properties.equals(properties1)); 
    } 
}

輸出：

Current Properties: {3=1000RS, 2=500RS, 1=100RS}
Properties 2: {Book=500, Mobile=5000, Pen=10, Clothes=400}
Are both properties equal: false

參考：https://docs.oracle.com/javase/9/docs/api/java/util/Properties.html#equals-java.lang.Object-

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注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Properties equals(value) method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。