KeyGenerator not available - Java issue

So I am doing a small project and getting extremely frusterated. Ive tried inputting different algorithms for the KeyGenerator and different key sizes but with no luck. Could someone please help me out?
If I put simply "AES" - I get ECB Mode can not use IV
and if I put "AES/CBC/PKCS5PADDING" - I get KeyGenerator not available

@SpringBootApplication
public class SslServerApplication {

	private static final String ALGORITHM = "AES/CBC/PKCS5PADDING";
	private static final int KEY_SIZE = 192;

	public static void main(String[] args) throws Exception {
	    SecretKey key = generateKey();
	    String message = "Hello, Professor Conlan!";

	    byte[] encrypted = encrypt(message, key);
	    byte[] hash = hash(encrypted);

	    System.out.println("Hash: " + bytesToHex(hash));

	    boolean verified = verifyChecksum(hash, encrypted, key);
	    System.out.println("Checksum verified: " + verified);
	}
	//generates secret key
	private static SecretKey generateKey() throws NoSuchAlgorithmException {
	    KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);
	    keyGenerator.init(KEY_SIZE);
	    return keyGenerator.generateKey();
	}
	//encrypts secret key key
	static byte[] encrypt(String message, SecretKey key) throws Exception {
	    Cipher cipher = Cipher.getInstance(ALGORITHM);
	    byte[] iv = new byte[cipher.getBlockSize()];
	    SecureRandom random = new SecureRandom();
	    random.nextBytes(iv);
	    cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv));
	    return cipher.doFinal(message.getBytes(StandardCharsets.UTF_8));
	}

	static byte[] hash(byte[] message) throws Exception {
	    MessageDigest md = MessageDigest.getInstance("SHA-256");
	    return md.digest(message);
	}

	private static boolean verifyChecksum(byte[] checksum, byte[] message, SecretKey key) throws Exception {
	    byte[] hash = hash(decrypt(message, key));
	    return MessageDigest.isEqual(hash, checksum);
	}
	//decrypts the encrypted secret key
	static byte[] decrypt(byte[] message, SecretKey key) throws Exception {
	    Cipher cipher = Cipher.getInstance(ALGORITHM);
	    byte[] iv = Arrays.copyOfRange(message, 0, cipher.getBlockSize());
	    cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
	    return cipher.doFinal(Arrays.copyOfRange(message, cipher.getBlockSize(), message.length));
	}

	static String bytesToHex(byte[] bytes) {
	    StringBuilder result = new StringBuilder();
	    for (byte b : bytes) {
	        result.append(String.format("%02x", b));
	    }
	    return result.toString();
	}
}

EDIT: This is my POM file

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.2.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.snhu</groupId>
	<artifactId>ssl-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>ssl-server</name>
	<description>ssl-server skeleton for CS-305</description>
	
	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-rest</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin>
            	<groupId>org.owasp</groupId>
            	<artifactId>dependency-check-maven</artifactId>
            	<version>5.3.0</version>
            	<configuration>
            	 <outputDirectory default-value="C:\Users\Shawn\Documents\M7 Folder"/>
            	</configuration>
            	
            	<executions>
                  <execution>
                      <goals>
                          <goal>check</goal>
                      </goals>
                  </execution>
              </executions>
            </plugin>
		</plugins>
	</build>

</project>

"AES/CBC/PKCS5PADDING" is a Cipher specification consisting of

• an algorithm name (AES - Cipher Algorithm Names)
• an algorithm mode (CBC - Cipher Algorithm Modes)
• an algorithm padding (PKCS5PADDING - Cipher Algorithm Paddings)

For the KeyGenerator only the algorithm itself is relevant (KeyGenerator Algorithms) and you must only specify the algorithm when calling KeyGenerator.getInstance().

KeyGenerator.getInstance("AES") will work for the KeyGenerator.

Note: For the Cipher you still must use "AES/CBC/PKCS5PADDING"! Otherwise you will get a provider-specific Cipher:

> A transformation is of the form:
>
> * "algorithm/mode/padding" or
> * "algorithm"
>
> (in the latter case, provider-specific default values for the mode and padding scheme are used).

You cannot use the same value for the KeyGenerator algorithm and the Cipher algorithm.

These are the legal values of KeyGenerator algorithm. Your value of AES/CBC/PKCS5PADDING is not among them as Thomas's answer correctly indicates.

AES
ARCFOUR
Blowfish
DES
DESede
HmacMD5
HmacSHA1 HmacSHA256 HmacSHA384 HmacSHA512
RC2

The following are the Cipher algorithms that must be supported by Java implementations. Your value of AES/CBC/PKCS5PADDING will work here (if your code gets far enough.

AES/CBC/NoPadding (128)
AES/CBC/PKCS5Padding (128)
AES/ECB/NoPadding (128)
AES/ECB/PKCS5Padding (128)
DES/CBC/NoPadding (56)
DES/CBC/PKCS5Padding (56)
DES/ECB/NoPadding (56)
DES/ECB/PKCS5Padding (56)
DESede/CBC/NoPadding (168)
DESede/CBC/PKCS5Padding (168)
DESede/ECB/NoPadding (168)
DESede/ECB/PKCS5Padding (168)
RSA/ECB/PKCS1Padding (1024, 2048)
RSA/ECB/OAEPWithSHA-1AndMGF1Padding (1024, 2048)
RSA/ECB/OAEPWithSHA-256AndMGF1Padding (1024, 2048)

The following is code that 'works'. Your code has other issues.

@SpringBootApplication
public class SslServerApplication {
private static final String KEYGENERATOR_ALGORITHM = "AES";
private static final String CIPHER_ALGORITHM = "AES/CBC/PKCS5PADDING";
private static final int KEY_SIZE = 192;
public static void main(String[] args) throws Exception {
SecretKey key = generateKey();
String message = "Hello, Professor Conlan!";
byte[] encrypted = encrypt(message, key);
byte[] hash = hash(encrypted);
System.out.println("Hash: " + bytesToHex(hash));
boolean verified = verifyChecksum(hash, encrypted, key);
System.out.println("Checksum verified: " + verified);
String decrypted =  new String(decrypt(encrypted, key));
System.out.println("Decrypted messaged: " + decrypted);
}
//generates secret key
private static SecretKey generateKey() throws NoSuchAlgorithmException {
KeyGenerator keyGenerator = KeyGenerator.getInstance(KEYGENERATOR_ALGORITHM);
keyGenerator.init(KEY_SIZE);
return keyGenerator.generateKey();
}
//encrypts secret key key
static byte[] encrypt(String message, SecretKey key) throws Exception {
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
byte[] iv = new byte[cipher.getBlockSize()];
SecureRandom random = new SecureRandom();
random.nextBytes(iv);
cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv));
return cipher.doFinal(message.getBytes(StandardCharsets.UTF_8));
}
static byte[] hash(byte[] message) throws Exception {
MessageDigest md = MessageDigest.getInstance("SHA-256");
return md.digest(message);
}
private static boolean verifyChecksum(byte[] checksum, byte[] message, SecretKey key) throws Exception {
byte[] hash = hash(decrypt(message, key));
return MessageDigest.isEqual(hash, checksum);
}
//decrypts the encrypted secret key
static byte[] decrypt(byte[] message, SecretKey key) throws Exception {
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
byte[] iv = Arrays.copyOfRange(message, 0, cipher.getBlockSize());
cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
return cipher.doFinal(Arrays.copyOfRange(message, cipher.getBlockSize(), message.length));
}
static String bytesToHex(byte[] bytes) {
StringBuilder result = new StringBuilder();
for (byte b : bytes) {
result.append(String.format("%02x", b));
}
return result.toString();
}