JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to get IP address of a Host in Java?


Description:

You can get IP address of any host by using InetAddress class. By calling getByName() method with host name as parameter, it returns InetAddress object. On this object you can call getHostAddress() method to get the IP address of the given host.


Code:
package com.myjava.ip;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class MyIpByHost {

    public static void main(String a[]){
    
        try {
            InetAddress host = InetAddress.getByName("www.java2novice.com");
            System.out.println(host.getHostAddress());
        } catch (UnknownHostException ex) {
            ex.printStackTrace();
        }
    }
}
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What is wrapper class?
Everything in java is an object, except primitives. Primitives are int, short, long, boolean, etc. Since they are not objects, they cannot return as objects, and collection of objects. To support this, java provides wrapper classes to move primitives to objects. Some of the wrapper classes are Integer, Long, Boolean, etc.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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