To read more than one line...

Question

I 've this code but it can read from keyboard only one line
(when I type enter after the first line an EOF is raised )>
BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
      String sql = "";
      System.out.println("Enter your JDBC/SQL query: ");
      try {
         sql = buf.readLine(); Someone can help me so that I can enter more than a line ?
Thanks a lot.

Answer 1

Do you want the user to entry two queries, one per line, or do you want to allow a single query to
be entered on two lines?
What happens when the query is only one line long?
What happens when the user wants to use more than two lines to enter the text?
Suggestion: use a loop and use something simple like a blank line to signal
end of input. It's not hard:
import java.io.*;
public class MultilineInputExample {
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for(int i=0; i < 2; ++i) {
            System.out.println("Enter multiline input. End with a blank line");
            String input = readMultilineInput(in);
            System.out.println("input = [" + input + "]");
    //uses a blank (white space) line to signal the end
    public static String readMultilineInput(BufferedReader in) throws IOException {
        StringBuilder b = new StringBuilder();
        String line;
        boolean notDone = true;
        while (notDone && (line = in.readLine()) != null) {
            if ((notDone = !line.trim().isEmpty()))
                b.append(line).append(' ');
        return b.toString();
}