added java example for create tweet

Manage-Tweets/create_tweet.java

@@ -0,0 +1,98 @@
+package org.example;
+
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.*;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.security.GeneralSecurityException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.time.Instant;
+import java.util.*;
+
+import com.google.gson.JsonObject;
+import oauth.signpost.exception.OAuthCommunicationException;
+import oauth.signpost.exception.OAuthExpectationFailedException;
+import oauth.signpost.exception.OAuthMessageSignerException;
+
+public class create_tweet {
+    public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException, GeneralSecurityException, OAuthMessageSignerException, OAuthExpectationFailedException, OAuthCommunicationException {
+        HttpClient client = HttpClient.newHttpClient();
+
+        // Create the OAuth parameters
+        String consumerKey = "CONSUMER_KEY"; // Your consumer key
+        String consumerSecret = "CONSUMER_SECRET"; // Your consumer secret
+        String token = "ACCESS_TOKEN"; // Your access token
+        String tokenSecret = "ACCESS_TOKEN_SECRET"; // Your access token secret
+        String nonce = randomNonce(); // A random string
+        String timestamp = String.valueOf(Instant.now().getEpochSecond()); // The current time in seconds since epoch
+        String signatureMethod = "HMAC-SHA1"; // The signature method
+        String version = "1.0"; // The OAuth version
+        String uri = "https://api.twitter.com/2/tweets";
+
+        JsonObject data = new JsonObject();
+        data.addProperty("text", "Your tweet data");
+
+        String authorizationHeader = generateHeader(uri, consumerKey, consumerSecret, token, tokenSecret, nonce, signatureMethod, timestamp, version);
+
+        // Create an HttpRequest object with the POST method, the URL, the headers and the body
+        HttpRequest request = HttpRequest.newBuilder()
+                .POST(HttpRequest.BodyPublishers.ofString(data.toString())) // The body of the request as a query string
+                .uri(URI.create("https://api.twitter.com/2/tweets")) // The URL of the API endpoint
+                .header("Content-Type", "application/json") // The content type header
+                .header("Authorization", authorizationHeader) // The authorization header with the OAuth parameters
+                .build();
+
+        // Send the request and get the response
+        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+
+        // Print the status code and the body of the response
+        System.out.println(response.statusCode());
+        System.out.println(response.body());
+    }
+
+    private static String generateHeader(String uri, String consumerKey, String consumerSecret, String token, String tokenSecret, String nonce, String signatureMethod, String timestamp, String version) throws UnsupportedEncodingException, NoSuchAlgorithmException, InvalidKeyException {
+        // Create the signature base string
+        String signatureBaseString = "POST&" +
+                URLEncoder.encode(uri, "UTF-8") + "&" +
+                URLEncoder.encode("oauth_consumer_key=" + consumerKey + "&", "UTF-8") +
+                URLEncoder.encode("oauth_nonce=" + nonce + "&", "UTF-8") +
+                URLEncoder.encode("oauth_signature_method=" + signatureMethod + "&", "UTF-8") +
+                URLEncoder.encode("oauth_timestamp=" + timestamp + "&", "UTF-8") +
+                URLEncoder.encode("oauth_token=" + token + "&", "UTF-8") +
+                URLEncoder.encode("oauth_version=" + version, "UTF-8");
+
+        // Generate the signing key
+        String signingKey = URLEncoder.encode(consumerSecret, "UTF-8") + "&" +
+                URLEncoder.encode(tokenSecret, "UTF-8");
+
+        // Generate the signature using HMAC-SHA1
+        SecretKeySpec keySpec = new SecretKeySpec(signingKey.getBytes(), "HmacSHA1");
+        Mac mac = Mac.getInstance("HmacSHA1");
+        mac.init(keySpec);
+        byte[] result = mac.doFinal(signatureBaseString.getBytes());
+        String signature = Base64.getEncoder().encodeToString(result);
+
+        // Create the authorization header
+        String authorizationHeader = "OAuth " + "oauth_consumer_key=\"" + consumerKey + "\"," +
+                "oauth_token=\"" + token + "\"," +
+                "oauth_signature_method=\"" + signatureMethod + "\"," +
+                "oauth_timestamp=\"" + timestamp + "\"," +
+                "oauth_nonce=\"" + nonce + "\"," +
+                "oauth_version=\"" + version + "\"," +
+                "oauth_signature=\"" + URLEncoder.encode(signature, "UTF-8") + "\"";
+
+        return authorizationHeader;
+    }
+
+    private static String randomNonce() {
+        SecureRandom secureRandom = new SecureRandom();
+        String randomNonce = String.format("%06d", secureRandom.nextInt(1000000000));
+        return randomNonce;
+    }
+}

Manage-Tweets/pom.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>Twitter API</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>oauth.signpost</groupId>
+            <artifactId>signpost-commonshttp4</artifactId>
+            <version>1.2</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.9.0</version>
+        </dependency>
+    </dependencies>
+</project>