Algorithm : The following algorithm is used to delete a record from file containing the student name of “John Perz”. Import a package named “os” to use remove and rename functions for files. Define “main()” function, Declare a variable named “found” and initialize it to be “False”. Open an input file named “students.txt” that is available on disk using “open()” function with “r” mode and initialize it into the “fileObject”. Open an output file named “temp.txt” using “open()” function with “w” mode and initialize it into the “temp_file”. Define a “while” loop to check the file until the value of “name” will be empty. Read the line from file using “readline()” method and store the score value into “score”. Strip the new line from the value of “name” variable. Using “if...else” condition check the name of “John Perz” is in file or not. If the name not presented in file copy all contents into temporary file. If the name presented in file and assign the value of “found” will be “True”. Read next line from file using “readline()” method. Close the file “students.txt” with “fileObject”. Close the file “temp.txt” with “temp_file”. Remove “students.txt” using “os.remove()” method. Rename “temp.txt” as “students.txt” using “os.rename()” method. Using “if...else” condition display the intimation message on the screen. Call the “main()” method.

Question

Want to see the full answer?

Answer 1

Question

Chapter 10, Problem 7AW

Program Plan Intro

Algorithm:

The following algorithm is used to delete a record from file containing the student name of “John Perz”.

Import a package named “os” to use remove and rename functions for files.

Define “main()” function,

Declare a variable named “found” and initialize it to be “False”.

Open an input file named “students.txt” that is available on disk using “open()” function with “r” mode and initialize it into the “fileObject”.

Open an output file named “temp.txt” using “open()” function with “w” mode and initialize it into the “temp_file”.

Define a “while” loop to check the file until the value of “name” will be empty.

Read the line from file using “readline()” method and store the score value into “score”.

Strip the new line from the value of “name” variable.

Using “if...else” condition check the name of “John Perz” is in file or not.

If the name not presented in file copy all contents into temporary file.

If the name presented in file and assign the value of “found” will be “True”.

Read next line from file using “readline()” method.

Close the file “students.txt” with “fileObject”.

Close the file “temp.txt” with “temp_file”.

Remove “students.txt” using “os.remove()” method.

Rename “temp.txt” as “students.txt” using “os.rename()” method.

Using “if...else” condition display the intimation message on the screen.

Call the “main()” method.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Add a timer in the following code. public class GameGUI extends JPanel { private final Labyrinth labyrinth; private final Player player; private final Dragon dragon; private Timer timer; private long elapsedTime; public GameGUI(Labyrinth labyrinth, Player player, Dragon dragon) { this.labyrinth = labyrinth; this.player = player; this.dragon = dragon; String playerName = JOptionPane.showInputDialog("Enter your name:"); player.setName(playerName); elapsedTime = 0; timer = new Timer(1000, e -> { elapsedTime++; repaint(); }); timer.start(); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); int cellSize = Math.min(getWidth() / labyrinth.getSize(), getHeight() / labyrinth.getSize());}

Change the following code so that when player wins the game, the game continues by creating new GameGUI with the same player. However the player's starting position is same, everything else should be reseted. public static void main(String[] args) { Labyrinth labyrinth = new Labyrinth(10); Player player = new Player(9, 0); Random rand = new Random(); Dragon dragon = new Dragon(rand.nextInt(10), 9); JFrame frame = new JFrame("Labyrinth Game"); GameGUI gui = new GameGUI(labyrinth, player, dragon); frame.setLayout(new BorderLayout()); frame.setSize(600, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(gui, BorderLayout.CENTER); frame.pack(); frame.setResizable(false); frame.setVisible(true); } public class GameGUI extends JPanel { private final Labyrinth labyrinth; private final Player player; private final Dragon dragon; private Timer timer; private long…

Create a menu item which restarts the game. Also add a timer, which counts the elapsed time since the start of the game level. When the restart is pressed, the restarted game should ask the player' name (in the GameGUI constructor) and set the score of player to 0 (player.setScore(0)), and the timer should restart again. And create a logic so that if the player loses his life (checkGame if the condition is false), then save this number together with his name into two variables. And display two buttons where one quits the game altogether (System.exit(0)) and the other restarts the game. public class GameGUI extends JPanel { private final Labyrinth labyrinth; private final Player player; private final Dragon dragon; private final ImageIcon playerIcon = new ImageIcon("data/images/player.png"); private final ImageIcon dragonIcon = new ImageIcon("data/images/dragon.png"); private final ImageIcon wallIcon = new ImageIcon("data/images/wall.png"); private final ImageIcon…