Could not generate DH keypair(httpclient)

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Add this library to classpath(following is maven project)

<dependency>
	<groupId>org.bouncycastle</groupId>
	<artifactId>bcprov-jdk16</artifactId>
	<version>1.46</version>
</dependency>

Add following line before access https resource:

Security.addProvider(new BouncyCastleProvider());
...
HttpClient client = ...
HttpGet get = new HttpGet("https://domain")
client.execute(get,repsonse);
...