Java MulticastSocket setTTL() Method

setTTL(byte ttl) is the method of MulticastSocket class. This method is used to set the default time-to-live for the multicast packets which are sent out on the socket in order to control the scope of the multicasts. the range 0 <= ttl <= 0xFF or an IllegalArgumentException will be thrown.

Syntax

Parameter

ttl - it is the time-to-live

Throw

IOException - this exception occurs while getting the default time-to-live value.

NOTE : this method is Deprecated, instead of this method setTimeToLive method is used as it returns an int instead of a byte.

Example 1

import java.io.IOException; 
import java.net.MulticastSocket; 
public class JavaMulticastSocketsetTTLExample1
{ 
    public static void main(String[] args) throws IOException  
    { 
          
        MulticastSocket ms1 = new MulticastSocket(); 
	//setTTL() method
        ms1.setTTL((byte) 25);
         System.out.println("TTL : " + ms1.getTTL()); 
    } 
  
}

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Output:

TTL : 25

Example 2

import java.io.IOException; 
import java.net.MulticastSocket; 
public class JavaMulticastSocketgetTTLExample_2 
{ 
    public static void main(String[] args) throws IOException  
    { 
          
        MulticastSocket ms1 = new MulticastSocket(); 
//setTTL() method
        ms1.setTTL((byte) 30);
         System.out.println("TTL : " + ms1.getTTL());
    } 
  
}

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Output: