JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to get Host name by IP address in Java?


Description:

Below example shows how to get host name for the given IP address. InetAddress class helps you to get these details. The method getByName() provides InetAddress object by passing IP address as its input. By calling getHostName() method on this object, you can get host name.


Code:
package com.myjava.ip;

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

public class MyHostName {

    public static void main(String a[]){
    
        try {
            InetAddress host = InetAddress.getByName("72.167.232.155");
            System.out.println(host.getHostName());
        } catch (UnknownHostException ex) {
            ex.printStackTrace();
        }
    }
}
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What is fail-fast in java?
A fail-fast system is nothing but immediately report any failure that is likely to lead to failure. When a problem occurs, a fail-fast system fails immediately. In Java, we can find this behavior with iterators. Incase, you have called iterator on a collection object, and another thread tries to modify the collection object, then concurrent modification exception will be thrown. This is called fail-fast.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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