Properties Set stringPropertyNames() method Example Program

Program

package com.candidjava;

import java.util.Properties;
import java.util.Set;

/* 
 * @author : Mohan 
 * @description : The java.util.Properties.stringPropertyNames() method returns a set of keys in this property list where the key and its corresponding value are strings, including distinct keys in the default property list if a key of the same name has not already been found from the main properties list. Properties whose key or value is not of type String are omitted. 
 */
public class PropertiesStringPropertyNames {
	public static void main(String[] args) {
		Properties prop = new Properties();

		// add some properties
		prop.put("kamal", "1");
		prop.put("karthic", "2");
		prop.put("partha", "3");

		// save the Property names in the set
		Set<String> set = prop.stringPropertyNames();

		// print the set
		System.out.println("" + set);
	}
}

Output

Explanation

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