Java HttpURLConnection getErrorStream() Method

The getErrorStream() is the method of HttpURLConnection class. This method is used to get an error stream if the connection is disconnected. This method does not set the connection. If the connection is not established or server does not cause any error during establishing the connection, then this method will return null. Null is the default value in this method.

Syntax

Returns

This method returns an error stream if any, else it returns default if no error occurs.

Example 1

import java.io.IOException; 
import java.io.InputStream;
import java.net.HttpURLConnection; 
import java.net.URL; 
public class JavaHttpURLConnectionGetErrorStreamMethodExample1 {
    //Starting the main method...
    public static void main(String h[]) throws IOException 
	{ 
        //starting the try block
        try 
        {
        String link_url ;
        link_url="https://www.javatpoint.com";
        URL obj1 = new URL(link_url); //URL Connection Created...
        HttpURLConnection con1 = (HttpURLConnection) obj1.openConnection(); //Http URL Connection Created...
        con1.setConnectTimeout(1000);
        con1.connect();
        InputStream a;
        a = con1.getErrorStream();
        System.out.println("Error Stream : "+a);
        con1.disconnect();
        System.out.println("Connection disconnected");
        }
        catch (Exception e) 
        {
            System.out.println( e);
        }
    }
}

Test it Now

Output:

Error Stream : null
Connection disconnected

Example 2

import java.io.IOException; 
import java.io.InputStream;
import java.net.HttpURLConnection; 
import java.net.URL; 
public class JavaHttpURLConnectionGetErrorStreamMethodExample2 {
    //Starting the main method...
    public static void main(String h[]) throws IOException 
	{ 
        //starting the try block
        try 
        {
        String link_url ;
        link_url="https://www.facebook.com";
        URL obj1 = new URL(link_url); //URL Connection Created...
        HttpURLConnection con1 = (HttpURLConnection) obj1.openConnection(); //Http URL Connection Created...
        con1.setConnectTimeout(1000);
        con1.connect();
System.out.println("Connection Established");
        InputStream a;
        a = con1.getErrorStream();
        System.out.println("Error Stream : "+a);
        System.out.println("Header field 1:" + con1.getHeaderField(1));
        con1.disconnect();
        System.out.println("Connection disconnected");
        }
        catch (Exception e) 
        {
            System.out.println( e);
        }
    }
}

Test it Now

Output:

Connection Established
Error Stream : null
Header field 1:0
Connection disconnected

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