How to convert java array type string to string array?

Question

I use apache kafka to publish the string message. Before publishing, message type is string array like below,

String[] msgArray = ["aaa", "bbb", "ccc"];

My kafka publishing message type is java string, so I convert this array to string with Arrays.toString(msgArray) method. Apache Kafka publishing and consuming work well. The received message is Java String,["aaa", "bbb", "ccc"]. But the problem is I have no idea how to convert this array type string message back to string array. Below is the part of my codes.

//record.value is array type string -> ["aaa", "bbb", "ccc"]
String[] parameters = new String[record.value().split(",").length];  
int i=0;
for(String str : record.value().split(",")) {
    if(i < parameters.length) {
        parameters[i] = str.replace("]", "").replace("[", "");
    }
    i++;
}

But the result is not appropriate. Are there any arrays api which converts array type string to string array?

It looks like what you're really trying to do is parse JSON. If that's the case, use a JSON parser. — chrylis -cautiouslyoptimistic-
– chrylis -cautiouslyoptimistic-, Commented Nov 4, 2019 at 5:58
Possible duplicate of string to string array conversion in java — www.hybriscx.com
– www.hybriscx.com, Commented Nov 4, 2019 at 6:07
What is the different between array type string and string array? — sovannarith cheav
– sovannarith cheav, Commented Nov 4, 2019 at 6:16
No, i can not. In kafka producer there is no string array type messages — Joseph Hwang
– Joseph Hwang, Commented Nov 4, 2019 at 6:25

akuiper · Accepted Answer · 2019-11-04 06:17:53Z

3

How about deserializing the String with JSONArray:

import org.json.JSONArray;

String[] msgArray = {"aaa", "bbb", "ccc"};

// serializing
String msg = Arrays.toString(msgArray);

// deserializing
JSONArray jsonArray = new JSONArray(msg);
System.out.println(jsonArray.toList());

answered Nov 4, 2019 at 6:17

akuiper

216k33 gold badges362 silver badges379 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Nikhil · Accepted Answer · 2019-11-04 06:28:46Z

0

You can follow Psidom's answer or try this option:

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;    
List<String> msgArray = new ObjectMapper().readValue(msg, new TypeReference<List<String>>(){});

answered Nov 4, 2019 at 6:28

Nikhil

1,25615 silver badges28 bronze badges

Comments

Garvit Khamesra · Accepted Answer · 2019-11-04 06:37:44Z

0

You can also use Object Mapper for serializing and deserializing your input and output. As it provide support of all of the data types as well as custom.

String[] msgArray = {"aaa", "bbb", "ccc"};

ObjectMapper objectMapper = new ObjectMapper();
String value = objectMapper.writeValueAsString(msgArray);
String[] strings = objectMapper.readValue(value, String[].class);

answered Nov 4, 2019 at 6:37

Garvit Khamesra

4053 silver badges10 bronze badges

Collectives™ on Stack Overflow

How to convert java array type string to string array?

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related