I have the following String:
String fullPDFContex = "Title1 Title2\r\nTitle3 Title4\r\n\r\nTitle5 Title6\r\n \r\n Title7 \r\n\r\n\r\n\r\n\r\n"
I want to convert it to an array of String which will look like this.
String[] Title = {"Title1 Title2","Title3 Title4","Title5 Title6","Title7"}
I am trying the following code.
String[] Title=fullPDFContext.split("\r\n\r\n|\r\n \r\n|\r\n");
But not getting the desired output.
You need to split with a pattern that matches any amount of whitespace that contains a line break:
String fullPDFContex = "Title1 Title2\r\nTitle3 Title4\r\n\r\nTitle5 Title6\r\n \r\n Title7 \r\n\r\n\r\n\r\n\r\n";
String separator = "\\p{javaWhitespace}*\\R\\p{javaWhitespace}*";
String results[] = fullPDFContex.split(separator);
System.out.println(Arrays.toString(results));
// => [Title1 Title2, Title3 Title4, Title5 Title6, Title7]
See the Java demo.
The \\p{javaWhitespace}*\\R\\p{javaWhitespace}* matches
\\p{javaWhitespace}* - 0+ whitespaces\\R - a line break (you may replace it with [\r\n] for Java 7 and older)\\p{javaWhitespace}* - 0+ whitespaces.Alternatively, you may use a bit more efficient
String separator = "[\\s&&[^\r\n]]*\\R\\s*";
See another demo
Unfortunately, the \R construct cannot be used in the character classes. The pattern will match:
[\\s&&[^\r\n]]* - zero or more whitespace chars other than CR and LF (character class subtraction is used here)\\R - a line break\\s* - any 0+ whitespace chars.
\\p{javaWhitespace} might be too long. A similar, but more efficient pattern is "[\\s&&[^\r\n]]*\\R\\s*" or "[\\s&&[^\r\n]]*[\r\n]\\s*".Here is your solution. we can use StringTokenizer & I have used list to insert the splitted values.This can help you if you have n number of values splitted from your array
package com.sujit;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
public class UserInput {
public static void main(String[] args) {
String fullPDFContex = "Title1 Title2\r\nTitle3 Title4\r\n\r\nTitle5 Title6\r\n \r\n Title7 \r\n\r\n\r\n\r\n\r\n";
StringTokenizer token = new StringTokenizer(fullPDFContex, "\r\n");
List<String> list = new ArrayList<>();
while (token.hasMoreTokens()) {
list.add(token.nextToken());
}
for (String string : list) {
System.out.println(string);
}
}
}
With this code you get the output you want:
String[] Title = fullPDFContext.split(" *(\r\n ?)+ *");
\n or \r, and if there are tabs before/after a line break. See my solution that handles that all.