java - How can I change multiple line from txt -


i have text file letters , want make them lower letters. code becomes last line 

    bufferedreader in = new bufferedreader(new filereader("c:\users\xxx\desktop\j.txt"));           string line;          while((line = in.readline()) != null)          {             blig=line.touppercase();           }            try (bufferedwriter writer = new bufferedwriter(new filewriter("c:\users\xxx\desktop\j.txt"))) {          writer.write(blig);      } 

bufferedreader in = new bufferedreader(new filereader("c:\users\xxx\desktop\j.txt")); bufferedwriter writer = new bufferedwriter(new filewriter("c:\users\xxx\desktop\lowerj.txt"));  string line; while((line = in.readline()) != null) {     writer.write(line.tolowercase()); }

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