You asked: How do you delete text in Java?

How do you delete a text file in Java?

In Java, we can delete a file by using the File. delete() method of File class. The delete() method deletes the file or directory denoted by the abstract pathname. If the pathname is a directory, that directory must be empty to delete.

How do I remove something from a string in Java?

The first and most commonly used method to remove/replace any substring is the replace() method of Java String class. The first parameter is the substring to be replaced, and the second parameter is the new substring to replace the first parameter.

How do you delete a line in Java?

You want to do something like the following:

  1. Open the old file for reading.
  2. Open a new (temporary) file for writing.
  3. Iterate over the lines in the old file (probably using a BufferedReader) …
  4. When done, close both files.
  5. Delete the old file.
  6. Rename the temporary file to the name of the original file.
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How do you delete in Java?

There is no delete in java, and all objects are created on the heap. The JVM has a garbage collector that relies on reference counts. Once there are no more references to an object, it becomes available for collection by the garbage collector.

How do I remove the first line from a text file in Java?

Scanner fileScanner = new Scanner(myFile); fileScanner. nextLine(); This will return the first line of text from the file and discard it because you don’t store it anywhere.

How do you remove words from a file?

Logic to remove word from file

  1. Open source file in r (read) mode. …
  2. Create and open a temporary file say delete. …
  3. Read word to remove from user in some variable say toRemove .
  4. Read a line from source file fPtr and store it in temporary buffer variable.

How do you remove all occurrences of a character from a string in Java?

str = str. replaceAll(“X,””); This should give you the desired answer. This solution takes into acount that the resulting String – in difference to replace() – never becomes larger than the starting String when removing characters.

How do I remove the middle character from a string in Java?

How to remove a particular character from a string ?

  1. public class RemoveChar {
  2. public static void main(String[] args) {
  3. String str = “India is my country”;
  4. System.out.println(charRemoveAt(str, 7));
  5. }
  6. public static String charRemoveAt(String str, int p) {
  7. return str.substring(0, p) + str.substring(p + 1);
  8. }

How do you replace words in Java?

To replace all words with another String using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.

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What is the difference between flush and close in Java?

flush() writes the content of the buffer to the destination and makes the buffer empty for further data to store but it does not closes the stream permanently. That means you can still write some more data to the stream. But close() closes the stream permanently.

What does flush do in Java?

The flush() method of PrintWriter Class in Java is used to flush the stream. By flushing the stream, it means to clear the stream of any element that may be or maybe not inside the stream. It neither accepts any parameter nor returns any value.

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