1. 确认AWS的Java SDK已正确设置并引入
2. 确认程序有访问队列的权限
3. 确认队列的名称和URL地址是否匹配
4. 确认发送的消息格式是否正确

以下是一个可能的代码示例，可以使用该代码检查并解决问题：

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.sqs.AmazonSQS;
import com.amazonaws.services.sqs.AmazonSQSClientBuilder;
import com.amazonaws.services.sqs.model.SendMessageRequest;
import com.amazonaws.services.sqs.model.SendMessageResult;

public class SendMessageToSQS {
    private static final String MESSAGE_BODY = "Example message";
    private static final String QUEUE_NAME = "example-queue";

    public static void main(String[] args) {
        AWSCredentials credentials = null;
        try {
            credentials = new ProfileCredentialsProvider().getCredentials();
        } catch (Exception e) {
            throw new RuntimeException("Cannot load credentials", e);
        }

        AmazonSQS sqsClient = AmazonSQSClientBuilder.standard()
                .withRegion(Regions.US_EAST_1)
                .withCredentials(new AWSStaticCredentialsProvider(credentials))
                .build();

        String queueUrl = sqsClient.getQueueUrl(QUEUE_NAME).getQueueUrl();

        SendMessageRequest request = new SendMessageRequest()
                .withQueueUrl(queueUrl)
                .withMessageBody(MESSAGE_BODY);

        SendMessageResult result = sqsClient.sendMessage(request);

        System.out.println("Message ID: " + result.getMessageId());
    }
}