Java input parameter from text file

Question

I want to know how I can get data from a text file to a java program from the command line. I am using windows.

I used

Java myprogram < c:\inputfile.txt

it doesn't work, but when I used

Java myprogram good

it works. 'good' is the word that i used it as input

FYI: when I used

Java myprogram good > c:\outfile.txt

this is for writing output to a text file ..

I need to read from the text file "inputfile.txt" and write to "outputfile.txt"

i used this

Java myprogram "c:\\inputfile.txt" > "c:\\outputfile.txt"

but not working

This code that i used it

import edu.smu.tspell.wordnet.*;

public class myprogram{
public static void main (String [] args) {

System.setProperty("wordnet.database.dir", "C:\\Program Files (x86)\\WordNet\\2.1\\dict\\");
WordNetDatabase database = WordNetDatabase.getFileInstance();
      String result = "";
        NounSynset nounSynset;
        NounSynset[] hyponyms;
        Synset[] synsets = database.getSynsets(args[0]);

        for (int i = 0; i < synsets.length; i++) { //iteratre over all senses
            String[] wordForms = synsets[i].getWordForms();
            for (int j = 0; j < wordForms.length; j++) {
                System.out.println(wordForms[j]);
            }

} 

}
}

anubhava · Accepted Answer · 2013-04-06 05:16:46Z

2

If you need to read input data from file then you need to write code for reading text file in your Java class to read.

It appears that your code is just getting input from command line and your are treating that command line argument as data.

See this example on how to read inputs from a text file.

answered Apr 6, 2013 at 5:16

anubhava

790k67 gold badges603 silver badges671 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Dheya Majid Over a year ago

thanks anubhava, please can you help me how can i used it in above java code

anubhava Over a year ago

@DheyaMajid: Please see the link I provided.

Dheya Majid Over a year ago

Thanks, buy i want to read it word by word and put word to args[0]

anubhava Over a year ago

As per your question you want to pass in the file name to your Java code and read file content from inside the Java code. Is my interpretation not correct?

Dheya Majid Over a year ago

Yes , that correct , i need to read the content word by word. because i want to used that word for another processing.

|

Ankur Shanbhag · Accepted Answer · 2013-04-06 05:07:43Z

0

Pass the value in double quotes like this :

Java myprogram good > "c:\\inputfile.txt"

answered Apr 6, 2013 at 5:07

Ankur Shanbhag

7,8042 gold badges31 silver badges38 bronze badges

2 Comments

Dheya Majid Over a year ago

i used Java myprogram "c:\\inputfile.txt"> "c:\\outputfile.txt" in CMD but not working

Ankur Shanbhag Over a year ago

where is the code to read the file? You need to write code to read the input file. Similarly for writing to a file.

Community · Accepted Answer · 2017-05-23 10:32:11Z

Below cmd will works only in unix flavor OS.

      java classfile > "/path/logfilename.log"

Below program will read the file and write to a different file ( You can do improvements as per your use case)

    public class ReadWriteFile {

        public static void main(String args[]) throws Exception {

        if (args.length == 0) {
            System.out.println("Enter the file name");
        } else {

            String fileName = args[0];

            BufferedReader input = new BufferedReader(new FileReader(fileName));

            String line = null;

            BufferedWriter writer = new BufferedWriter( new FileWriter( "output.txt"));

            try {
                while (( line = input.readLine()) != null){
                    System.out.println(line);
                    //or
                    writer.write(line);
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if(input != null) input.close();                
                if ( writer != null) writer.close( );
            }
        }
    }

}

For character by character reading refer the below how-do-i-read-input-character-by-character-in-java

Collectives™ on Stack Overflow

Java input parameter from text file

3 Answers 3

7 Comments

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

7 Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related