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73 lines
1.9 KiB
Java
73 lines
1.9 KiB
Java
/** lab1
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* @author Flavien HAAS
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* @version 1.0
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* october, 2020
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* Maynooth University
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*/
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import java.io.InputStreamReader;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileReader;
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import java.io.FileWriter;
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import java.io.IOException;
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public class lab1 {
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public static void main(String args[]) throws IOException{
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String nameinputfile;
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String nameoutputfile;
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BufferedReader sometext;
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File inputfile;
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File outputfile;
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FileReader filereader;
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BufferedReader bufferedreader;
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FileWriter filewriter;
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String onelinecontent;
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//acquire input file name
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System.out.println("Please enter input file :");
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sometext = new BufferedReader (new InputStreamReader(System.in));
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nameinputfile = sometext.readLine();
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//acquire output file name
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System.out.println("Please enter output file :");
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sometext = new BufferedReader (new InputStreamReader(System.in));
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nameoutputfile = sometext.readLine();
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inputfile = new File(nameinputfile);
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outputfile = new File(nameoutputfile);
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//tests to see if files exists or not
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if (!inputfile.exists()){
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System.out.println("the input file name given does not exists");
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System.exit(0);
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}
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if (outputfile.exists()){
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System.out.println("the output file already exists");
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System.exit(0);
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}
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//copy the input file content to the the output file
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filereader = new FileReader(nameinputfile);
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bufferedreader = new BufferedReader(filereader);
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filewriter = new FileWriter(nameoutputfile, true);
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while ((onelinecontent = bufferedreader.readLine()) != null) { // read a line
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filewriter.write(onelinecontent); // write to output file
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filewriter.flush();
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}
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bufferedreader.close();
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filewriter.close();
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//write completion message to screen
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System.out.println("the content from the input file has been copied to the output file");
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}
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}
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