Converting a Scanner File into a String that contains the entire file output in Java










0














I am working on a MabLibs project that is supposed to iterate through a file, prompt you with anything contained in a <> block and allow you to write over to a new file.



I cannot figure out how to use a Scanner to read a file and turn that into a string so I can use the .length() method to iterate a for loop through the file to find these <> blocks.



I can only use Scanner and can't use array lists, so unfortunately the for loop is the only way I can do this.



Here's the code:



import java.io.*;
import java.util.*;

public class MadLibs

public static void main(String args)
throws FileNotFoundException
intro();
madLib();




public static void intro()
System.out.println("Welcome to the game of Mad Libs.");
System.out.println("I will ask you to provide various words");
System.out.println("and phrases to fill in a story.");
System.out.println("The result will be written to an output file.");
System.out.println();



public static void madLib() throws FileNotFoundException r.equalsIgnoreCase("q")))
System.out.println("(C)reate mad-lib, (V)iew mad-lib, (Q)uit? ");

if (r.equalsIgnoreCase("v"))
viewFile();

else if (r.equalsIgnoreCase("c"))
createWord();




public static void createWord() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
String input2 = input1;
PrintStream output = new PrintStream(new File(toRead));
while (input1.hasNext())
String input = input1.next();
for (int i = 0; i < input2.length(); i++)
if (input.startsWith("<") && input.endsWith(">"))
String token = input.substring(1, input.length() - 1);
System.out.println("Please input a: " + token);
Scanner scan = new Scanner(System.in);
String replacement = scan.nextLine();
token = token.replace(token, replacement);
output.print(token);






public static void viewFile() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
System.out.println();
while (input1.hasNextLine())
System.out.println(input1.nextLine());





Any help is greatly appreciated.










share|improve this question



















  • 1




    The standard way to to open fileA loop read line change line write to fileB end loop rename fileB to fileA
    – Scary Wombat
    Nov 13 '18 at 1:08










  • Maybe the whole line is not quoted with <...> so use some regex to replace <....> with your new content
    – Scary Wombat
    Nov 13 '18 at 1:09






  • 1




    does this compile first, i believe you should get compilation error Scanner input1 = new Scanner(new File(toRead)); String input2 = input1;
    – Deadpool
    Nov 13 '18 at 1:18
















0














I am working on a MabLibs project that is supposed to iterate through a file, prompt you with anything contained in a <> block and allow you to write over to a new file.



I cannot figure out how to use a Scanner to read a file and turn that into a string so I can use the .length() method to iterate a for loop through the file to find these <> blocks.



I can only use Scanner and can't use array lists, so unfortunately the for loop is the only way I can do this.



Here's the code:



import java.io.*;
import java.util.*;

public class MadLibs

public static void main(String args)
throws FileNotFoundException
intro();
madLib();




public static void intro()
System.out.println("Welcome to the game of Mad Libs.");
System.out.println("I will ask you to provide various words");
System.out.println("and phrases to fill in a story.");
System.out.println("The result will be written to an output file.");
System.out.println();



public static void madLib() throws FileNotFoundException r.equalsIgnoreCase("q")))
System.out.println("(C)reate mad-lib, (V)iew mad-lib, (Q)uit? ");

if (r.equalsIgnoreCase("v"))
viewFile();

else if (r.equalsIgnoreCase("c"))
createWord();




public static void createWord() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
String input2 = input1;
PrintStream output = new PrintStream(new File(toRead));
while (input1.hasNext())
String input = input1.next();
for (int i = 0; i < input2.length(); i++)
if (input.startsWith("<") && input.endsWith(">"))
String token = input.substring(1, input.length() - 1);
System.out.println("Please input a: " + token);
Scanner scan = new Scanner(System.in);
String replacement = scan.nextLine();
token = token.replace(token, replacement);
output.print(token);






public static void viewFile() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
System.out.println();
while (input1.hasNextLine())
System.out.println(input1.nextLine());





Any help is greatly appreciated.










share|improve this question



















  • 1




    The standard way to to open fileA loop read line change line write to fileB end loop rename fileB to fileA
    – Scary Wombat
    Nov 13 '18 at 1:08










  • Maybe the whole line is not quoted with <...> so use some regex to replace <....> with your new content
    – Scary Wombat
    Nov 13 '18 at 1:09






  • 1




    does this compile first, i believe you should get compilation error Scanner input1 = new Scanner(new File(toRead)); String input2 = input1;
    – Deadpool
    Nov 13 '18 at 1:18














0












0








0







I am working on a MabLibs project that is supposed to iterate through a file, prompt you with anything contained in a <> block and allow you to write over to a new file.



I cannot figure out how to use a Scanner to read a file and turn that into a string so I can use the .length() method to iterate a for loop through the file to find these <> blocks.



I can only use Scanner and can't use array lists, so unfortunately the for loop is the only way I can do this.



Here's the code:



import java.io.*;
import java.util.*;

public class MadLibs

public static void main(String args)
throws FileNotFoundException
intro();
madLib();




public static void intro()
System.out.println("Welcome to the game of Mad Libs.");
System.out.println("I will ask you to provide various words");
System.out.println("and phrases to fill in a story.");
System.out.println("The result will be written to an output file.");
System.out.println();



public static void madLib() throws FileNotFoundException r.equalsIgnoreCase("q")))
System.out.println("(C)reate mad-lib, (V)iew mad-lib, (Q)uit? ");

if (r.equalsIgnoreCase("v"))
viewFile();

else if (r.equalsIgnoreCase("c"))
createWord();




public static void createWord() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
String input2 = input1;
PrintStream output = new PrintStream(new File(toRead));
while (input1.hasNext())
String input = input1.next();
for (int i = 0; i < input2.length(); i++)
if (input.startsWith("<") && input.endsWith(">"))
String token = input.substring(1, input.length() - 1);
System.out.println("Please input a: " + token);
Scanner scan = new Scanner(System.in);
String replacement = scan.nextLine();
token = token.replace(token, replacement);
output.print(token);






public static void viewFile() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
System.out.println();
while (input1.hasNextLine())
System.out.println(input1.nextLine());





Any help is greatly appreciated.










share|improve this question















I am working on a MabLibs project that is supposed to iterate through a file, prompt you with anything contained in a <> block and allow you to write over to a new file.



I cannot figure out how to use a Scanner to read a file and turn that into a string so I can use the .length() method to iterate a for loop through the file to find these <> blocks.



I can only use Scanner and can't use array lists, so unfortunately the for loop is the only way I can do this.



Here's the code:



import java.io.*;
import java.util.*;

public class MadLibs

public static void main(String args)
throws FileNotFoundException
intro();
madLib();




public static void intro()
System.out.println("Welcome to the game of Mad Libs.");
System.out.println("I will ask you to provide various words");
System.out.println("and phrases to fill in a story.");
System.out.println("The result will be written to an output file.");
System.out.println();



public static void madLib() throws FileNotFoundException r.equalsIgnoreCase("q")))
System.out.println("(C)reate mad-lib, (V)iew mad-lib, (Q)uit? ");

if (r.equalsIgnoreCase("v"))
viewFile();

else if (r.equalsIgnoreCase("c"))
createWord();




public static void createWord() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
String input2 = input1;
PrintStream output = new PrintStream(new File(toRead));
while (input1.hasNext())
String input = input1.next();
for (int i = 0; i < input2.length(); i++)
if (input.startsWith("<") && input.endsWith(">"))
String token = input.substring(1, input.length() - 1);
System.out.println("Please input a: " + token);
Scanner scan = new Scanner(System.in);
String replacement = scan.nextLine();
token = token.replace(token, replacement);
output.print(token);






public static void viewFile() throws FileNotFoundException
System.out.println("Input file name: ");
Scanner viewFile = new Scanner(System.in);
String toRead = viewFile.nextLine();
File f = new File(toRead);
while (!f.exists())
System.out.println("File Not Found. Try again: ");
toRead = viewFile.nextLine();
f = new File(toRead);

Scanner input1 = new Scanner(new File(toRead));
System.out.println();
while (input1.hasNextLine())
System.out.println(input1.nextLine());





Any help is greatly appreciated.







java string loops






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 13 '18 at 1:10









Deadpool

4,4692326




4,4692326










asked Nov 13 '18 at 1:03









N.SpiessN.Spiess

212




212







  • 1




    The standard way to to open fileA loop read line change line write to fileB end loop rename fileB to fileA
    – Scary Wombat
    Nov 13 '18 at 1:08










  • Maybe the whole line is not quoted with <...> so use some regex to replace <....> with your new content
    – Scary Wombat
    Nov 13 '18 at 1:09






  • 1




    does this compile first, i believe you should get compilation error Scanner input1 = new Scanner(new File(toRead)); String input2 = input1;
    – Deadpool
    Nov 13 '18 at 1:18













  • 1




    The standard way to to open fileA loop read line change line write to fileB end loop rename fileB to fileA
    – Scary Wombat
    Nov 13 '18 at 1:08










  • Maybe the whole line is not quoted with <...> so use some regex to replace <....> with your new content
    – Scary Wombat
    Nov 13 '18 at 1:09






  • 1




    does this compile first, i believe you should get compilation error Scanner input1 = new Scanner(new File(toRead)); String input2 = input1;
    – Deadpool
    Nov 13 '18 at 1:18








1




1




The standard way to to open fileA loop read line change line write to fileB end loop rename fileB to fileA
– Scary Wombat
Nov 13 '18 at 1:08




The standard way to to open fileA loop read line change line write to fileB end loop rename fileB to fileA
– Scary Wombat
Nov 13 '18 at 1:08












Maybe the whole line is not quoted with <...> so use some regex to replace <....> with your new content
– Scary Wombat
Nov 13 '18 at 1:09




Maybe the whole line is not quoted with <...> so use some regex to replace <....> with your new content
– Scary Wombat
Nov 13 '18 at 1:09




1




1




does this compile first, i believe you should get compilation error Scanner input1 = new Scanner(new File(toRead)); String input2 = input1;
– Deadpool
Nov 13 '18 at 1:18





does this compile first, i believe you should get compilation error Scanner input1 = new Scanner(new File(toRead)); String input2 = input1;
– Deadpool
Nov 13 '18 at 1:18













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