Points related to Properties class.
- Properties class introduced in jdk1.0 extends Hashtable class.
- Properties class is synchronized as all methods are synchronized.
- This class store property in a simple XML format(UTF-8 character encoding is used) using storeToXML(OutputStream, String, String) method.
Example of Properties class –
Example 1 –
package propertiesclass;
import java.util.*;
public class Example1 {
public static void main(String[] args) {
//creating Properties object
Properties propertiesObj = new Properties();
propertiesObj.put("2", "ram");
propertiesObj.put("4", "mohan");
propertiesObj.put("6", "sohan");
propertiesObj.put("5", "rohan");
propertiesObj.put("1", "mohit");
for (Object key : propertiesObj.keySet()) {
System.out.println("Key is : " + key + " Value is : " + propertiesObj.get(key));
}
}
}
Output is –
Key is : 6 Value is : sohan
Key is : 5 Value is : rohan
Key is : 4 Value is : mohan
Key is : 2 Value is : ram
Key is : 1 Value is : mohit
Example 2 – getting Properties class reference using System.getProperties()
package propertiesclass;
import java.util.*;
public class Example2 {
public static void main(String[] args) {
Properties p = System.getProperties();
System.out.println(p);
}
}