Java file edit example

Adesh singh Adesh singh 2, 9 9 gold badges 22 22 silver badges 36 36 bronze badges. Add a comment. Active Oldest Votes.

ByteHamster 4, 9 9 gold badges 35 35 silver badges 51 51 bronze badges. Mateusz Mateusz 2, 18 18 silver badges 28 28 bronze badges. Somnath Musib 3, 2 2 gold badges 26 26 silver badges 43 43 bronze badges. Sandeep Salian Sandeep Salian 2 2 silver badges 8 8 bronze badges. Why is this better? It seems like it is doing the same thing Why do you need Apache for this? Could you please elaborate why? Yes, generally speaking, a reason would be because the offsets within the file will shift everytime you make a write and the read cursor will not keep track of that see the accepted answer here: stackoverflow.

Still, after rereading this question, the problem here was not that i answered too fast , but a mattering of not closing and flusing.

Make sure to: close any stream when you no longer need them In particular before reopening it for writing. He reads the lines into a list, then writes the list to file, or at least is attempting to.

In the above example, we have created a file object named file. The file object is linked with the specified file path. Here, we have used the file object to create the new file with the specified path. If newFile. To read data from the file, we can use subclasses of either InputStream or Reader. In the above example, we have used created an object of FileReader named input. It is now linked with the input.

To read the data from the input. To write data to the file, we can use subclasses of either OutputStream or Writer. In the above example, we have created a writer using the FileWriter class. The writer is linked with the output.

Here when we run the program, the output. We can use the delete method of the File class to delete the specified file or directory. It returns. In the above example, we have created an object of File named file. The file now holds the information about the specified file. DeleteRecordByID ;. SearchRecordbyID ;. Add record in. String ID , name , age , addr ;. View record in. String record ;. Delete record in.

DataInputStream; import java. FileInputStream; import java. IOException; import java. Few points: close calls should always go in the "finally" blocks Never use System. Boolean returns are your friend. Always check the return status of "delete " call because file deletion failures are pretty common.

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