How to update already existing file in google drive api v3 java

Question

I have tried with the following code... Without any luck...

private void updateFile(Drive service, String fileId) {
        try {
            File file = new Fil         


        

Answer 1

I can share javascript code for uploading to an already existing file using v3

    const url = 'https://www.googleapis.com/upload/drive/v3/files/' + fileId + '?uploadType=media';
if(self.fetch){
var setHeaders = new Headers();
setHeaders.append('Authorization', 'Bearer ' + authToken.access_token);
setHeaders.append('Content-Type', mime);

var setOptions = {
    method: 'PATCH',
    headers: setHeaders,
    body:  data 
};
fetch(url,setOptions)
    .then(response => { if(response.ok){
    console.log("save to drive");
    }
            else{
                console.log("Response wast not ok");
            }
              })
    .catch(error => {
    console.log("There is an error " + error.message);
    });