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In Java, what is the purpose of Properties file?

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Pragya Keshap answered on February 4, 2023 Popularity 8/10 Helpfulness 2/10

answer In Java, what is the purpose of Properties file?

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In Java, what is the purpose of Properties file?

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A Properties file in Java is a list of key-value pairs that can be

parsed by java.util.Properties class.

Generally a Properties file has extension .properties e.g.

myapp.properties.

Properties files are used for many purposes in all kinds of Java

applications. Some of the uses are to store configuration, initial

data, application options etc.

When we change the value of a key in a properties file, there is no

need to recompile the Java application. So it provides benefit of

changing values at runtime.

https://www.ibm.com/docs/en/sim/6.0.0?topic=files-properties

Popularity 8/10 Helpfulness 2/10 Language java

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Tags: java

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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/***** This filename is config.properties
# Database configuration
db.url=jdbc:mysql://localhost:3306/mydatabase
db.username=admin
db.password=secret

# Server configuration
server.port=8080
server.host=localhost
*/
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

public class PropertyFileReader {
    public static void main(String[] args) {
        Properties properties = new Properties();

        try (FileInputStream input = new FileInputStream("config.properties")) {
            // Load the properties file
            properties.load(input);

            // Retrieve values
            String dbUrl = properties.getProperty("db.url");
            String dbUsername = properties.getProperty("db.username");
            String dbPassword = properties.getProperty("db.password");

            // Display values
            System.out.println("Database URL: " + dbUrl);
            System.out.println("Database Username: " + dbUsername);
            System.out.println("Database Password: " + dbPassword);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Popularity 6/10 Helpfulness 7/10 Language java

Source: Grepper

Tags: java properties-file

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Contributed on Jan 06 2024

Innocent Iguana

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In Java, what is the purpose of Properties file?

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