CODEWITHSUNDEEP
javastringlist
Jayendran
Jayendran

Reputation: 10930

Convert List<Class> into String JAVAI

I've a List of values, which is

List<Test> myList;

public class Test {
    String type;
    String value;
}

When I debug the List Value looks like

Test(type=6140, value=2017)
Test(type=6144, value=2017)

I want to convert this into a string,

So I tried with like

List<Test> myList;

StringBuilder abc = new StringBuilder();
for(Object a: myList){
    abc.append(String.valueOf(a));
}

But the result will be like 

Test(type=6140, value=2017)Test(type=6144, value=2017)

But I want to convert the value as 

[{"type":6140,"value":"2017"},{"type":6144,"value":"2017"}]

Upvotes: 0

Views: 79

Answers (3)

sanjeevjha
sanjeevjha

Reputation: 1549

if you override the toString method in class Test then the output will be as per your expection.

@Override
public String toString() {
    return "{" +
            "type=" + type +
            ", value=" + value +
            '}';
}

output:

[{"type":6140,"value":"2017"},{"type":6144,"value":"2017"}]

Upvotes: 0

Akhil Dabral
Akhil Dabral

Reputation: 890

Try using GSON After including the library this task could be as simple as Gson gson = new Gson(); String jsonString = gson.toJson(myList)

Upvotes: 2

Marvin Klar
Marvin Klar

Reputation: 1917

You could either overwrite the ToString() function in your class 'Test' or serialize the objects with JSON. JSON will give you an other but similar output than wanted. So overwriting the function ToString() will fit your needs more.

Upvotes: 2

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