Java program help

Question

I made a class Anagrams that writes the permutations of the words in a sentence and when I run the compiled program as java Anagrams "sentence1" "sentence2"... It should generate the permutations of each of the sentences. How would I get it to do that?

import java.io.*;
import java.util.Random;
import java.util.ArrayList;
import java.util.Collections;

public class Anagrams
{

    ...

    public static void main(String args[])
    {
        String phrase1 = "";
        System.out.println("Enter a sentence.");
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        try { phrase1 = input.readLine(); }
        catch (IOException e) {
        System.out.println("Error!");
        System.exit(1);
        }

        System.out.println();
        new Anagrams(phrase1).printPerms();
    }


}

this is what i have so far i just need it to run on "sentence1" "sentence2" ... when i type the command java Anagrams "sentece1" "sentence2" ... ive already compiled it using javac Anagrams.java

Can you show us what you have so far, and where you are stuck? — rsp
– rsp, Commented Mar 21, 2011 at 21:09
In your question you said you will use arguments to pass sentence1 and sentence2 but in your code I see that you're not using arguments but wait for user input. So what is really your goal? — RoflcoptrException
– RoflcoptrException, Commented Mar 21, 2011 at 21:26
my goal is to use arguments but i dont know how i would be able to do it for 1 ... n arguments. — Homes
– Homes, Commented Mar 21, 2011 at 21:35

RoflcoptrException · Accepted Answer · 2011-03-21 21:42:03Z

2

From your comment I think your only question is how to use command line arguments to solve the task:

Your main method is looking like this:

public static void main(String args[])

but should look like this

public static void main(String[] args)

You see that there is an array of strings that holds the command line arguments. So if your executing your code with

java Anagrams sentence1 sentence2

Then the array has the length 2. In the first place (args[0]) there is the value sentence1 and in the second place (args[1]) there is the value sentence2.

An example code that prints all your command line arguments looks like this:

public static void main (String[] args) {
        for (String s: args) {
            System.out.println(s);
        }
    }

Now you should be able to use your anagram algorithm for each command line argument.

answered Mar 21, 2011 at 21:42

RoflcoptrException

52.3k35 gold badges154 silver badges200 bronze badges

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

1 Comment

Homes Over a year ago

thanks im new to java and didnt know that had anything to do with it. i got it now

corsiKa · Accepted Answer · 2011-03-21 21:44:08Z

0

Here's a simple example of getting the arguments from the command line.

Bear in mind that this is open to "IndexOutOfBoundsException"s if you don't provide enough arguments, so make sure to check that in your code!

class ArgsExample {
    public static void main(String[] args) {
        System.out.println(args[0]);
        System.out.println(args[1]);

    }

}

C:\Documents and Settings\glow\My Documents>javac ArgsExample.java

C:\Documents and Settings\glow\My Documents>java ArgsExample "This is one" "This
 is two"
This is one
This is two

C:\Documents and Settings\glow\My Documents>

answered Mar 21, 2011 at 21:44

corsiKa

82.8k26 gold badges162 silver badges210 bronze badges

Comments

Feanor · Accepted Answer · 2011-03-21 21:44:32Z

0

Varargs would allow you to use an indeterminate number of strings in a method signature, if that's what you're looking for. Otherwise, Roflcoptr is right if it's a question of passing arguments into main.

answered Mar 21, 2011 at 21:44

Feanor

2,7254 gold badges29 silver badges43 bronze badges

Collectives™ on Stack Overflow

Java program help

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related