How to Append Data to a File in Java Without Overwriting?

Writing to a File Without Overwriting in Java Using FileWriter

When working with text files in Java, the FileWriter class offers methods to create, write to, and modify files. One common requirement is the ability to append content to a file without deleting its existing contents. This can be achieved by utilizing the "append" mode feature of FileWriter.

Solution:

To write to the same file repeatedly without overwriting data, follow these steps:

1. Instantiate the FileWriter object with the target file path as the first argument.
2. Pass true as the second argument to FileWriter's constructor to enable "append" mode. This indicates that the file should be opened for appending.

Example Code:

FileWriter fout = new FileWriter("filename.txt", true);
PrintWriter fileout = new PrintWriter(fout, true);
fileout.print("New data to append to the file");
fileout.close();

In this example, the fout object is created with "append" mode enabled by setting the second argument to true. This ensures that any data written to the file will be appended to the existing contents rather than overwriting them.

Additional Information:

• The PrintWriter class is used as a wrapper for FileWriter for convenience. It provides additional methods for writing different types of data.
• You can find further documentation on FileWriter usage here: [FileWriter Usage Reference](https://docs.oracle.com/javase/7/docs/api/java/io/FileWriter.html)

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