Append JSON element to JSON array in file using Java -

Append JSON element to JSON array in file using Java -

currently have next json array object in file(name.json).

[{ "name":"ray", "value":"1" }, ]

now want add together 1 more element in json array in file using java. this:

[{ "name":"ray", "value":"1" }, { "name":"john", "value":"2" } ]

one way read entire array file, append element array , write json file in java. not optimum way task. can suggest other way this?

try this:

1 - create randomaccessfile object read/write permissions ("rw");

randomaccessfile randomaccessfile = new randomaccessfile("/path/to/file.json", "rw");

2 - set file cursor position of char "]"

long pos = randomaccessfile.length(); while (randomaccessfile.length() > 0) { pos--; randomaccessfile.seek(pos); if (randomaccessfile.readbyte() == ']') { randomaccessfile.seek(pos); break; } }

3 - write comma (if not first element), new json element , char "]"

string jsonelement = "{ ... }"; randomaccessfile.writebytes("," + jsonelement + "]");

4 - close file

randomaccessfile.close();

java json