Properties stringPropertyNames() in Java

stringPropertyNames(): This method is available in java.util.Properties class of Java.

Syntax:

Set<String> java.util.Properties.stringPropertyNames()

This method returns an unmodifiable set of keys from this property list where the key and its corresponding value are strings.

Parameters: NA

Returns: an unmodifiable set of keys in this property list where the key and its corresponding value are strings, including the keys in the default property list.

Exceptions: NA

Approach

Java

import java.util.Properties;

public class PropertiesstringPropertyNames {
    public static void main(String[] args) {

        Properties properties = new Properties();

        properties.put("Hello", "World");
        properties.put("C++", "Program");
        properties.put("Java", "Program");

        System.out.println(properties.stringPropertyNames());
    }
}

Output:

[Java, C++, Hello]