Java - URLConnection setDoInput(boolean doinput)

Description

The Java URLConnection setDoInput(boolean doinput) method sets the value of the doInput field for this URLConnection to the specified value. A URL connection can be used for input and/or output. Set the doInput flag to true if you intend to use the URL connection for input, false if not. The default is true.

Declaration

Following is the declaration for java.net.URLConnection.setDoInput(boolean doinput) method

public void setDoInput(boolean doinput)

Parameters

doinput − the new value.

Return Value

NA

Exception

IllegalStateException − if already connected

Example 1

The following example shows the usage of Java URLConnection setDoInput() method for a valid url with https protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the URLConnection instance. Using getDoInput(), we're getting the default value of the doInput flag of URLConnection instance and printing the same. Then using setDoInput() method we've changed the value of doInput flag to false and printed the same again −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("https://www.tutorialspoint.com");
         URLConnection urlConnection = url.openConnection();

         System.out.println(urlConnection.getDoInput());
         urlConnection.setDoInput(false);
         System.out.println(urlConnection.getDoInput());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Output

true
false

Example 2

The following example shows the usage of Java URLConnection setDoInput() method for a valid url with http protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the URLConnection instance. Using getDoInput(), we're getting the default value of the doInput flag of URLConnection instance and printing the same. Then using setDoInput() method we've changed the value of doInput flag to false and printed the same again −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http://www.tutorialspoint.com");
         URLConnection urlConnection = url.openConnection();

         System.out.println(urlConnection.getDoInput());
         urlConnection.setDoInput(false);
         System.out.println(urlConnection.getDoInput());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Output

true
false

Example 3

The following example shows the usage of Java URLConnection setDoInput() method for a url of google with http protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the URLConnection instance. Using getDoInput(), we're getting the default value of the doInput flag of URLConnection instance and printing the same. Then using setDoInput() method we've changed the value of doInput flag to false and printed the same again −

package com.tutorialspoint;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class UrlConnectionDemo {
   public static void main(String [] args) {
      try {
         URL url = new URL("http://www.google.com");
         URLConnection urlConnection = url.openConnection();

         System.out.println(urlConnection.getDoInput());
         urlConnection.setDoInput(false);
         System.out.println(urlConnection.getDoInput());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Output

true
false