Reading a paragraph from the command line on java console program

Question

The while loop in the following program does not terminate so I can't get the output in the last line that tries to print the variable paragraph to console. There are similar problems but the solutions are not practicle and I could not do them. Please suggest a solution.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Test {


    public static void main(String[] args) throws IOException {
        String line = "";
        String paragraph = "";

        System.out.println("Enter the text: ");
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader bufferedReader = new BufferedReader(isr);
             while ((line = bufferedReader.readLine()) != null)
             {
                  paragraph = paragraph + line + " ";
             }
          isr.close();
          bufferedReader.close();
          System.out.println(paragraph);
    }//method main ends here

}

Answer 1

The code

while ((line = bufferedReader.readLine()) != null)

will never be true if you dont assign null to line , and you cant assign null to an object through console , so that means you have to code it for something , like enter key or any other character to end the input.

like

while(!(line.equals("exit")))
{
      //whatever
}

This means when you type exit at end , the program will terminate and print the paragraph.

You can try this snippet

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

    public class Test {


        public static void main(String[] args) throws IOException {
            String line = "";
            String paragraph = "";

            System.out.println("Enter the text: ");
            InputStreamReader isr = new InputStreamReader(System.in);
            BufferedReader bufferedReader = new BufferedReader(isr);
                 do
                 {
                     line = bufferedReader.readLine();
                      paragraph = paragraph + line + " ";
                 }while(!line.equals("exit"));
              isr.close();
              bufferedReader.close();
              System.out.println(paragraph);
        }//method main ends here

    }