Split string with | separator in java

Question

I have a string that\'s like this: 1|\"value\"|;

I want to split that string and have chosen | as the separator.

My code looks like

Answer 1

Pattern.compile("|").splitAsStream(String you want to split).collect(Collectors.toList());

Answer 2

String.split() uses regex, so you need to escape the '|' like .split("\\|");

Answer 3

You have to escape the | because it has a special meaning in a regex. Have a look at the split(..) method.

String[] sep = line.split("\\|");

The second \ is used to escape the | and the first \ is used to escape the second \ :).

Answer 4

It won't work this way, because you have to escape the Pipe | first. The following sample code, found at (http://www.rgagnon.com/javadetails/java-0438.html) shows an example.

public class StringSplit {
  public static void main(String args[]) throws Exception{
    String testString = "Real|How|To";
    // bad
    System.out.println(java.util.Arrays.toString(
        testString.split("|")
    ));
    // output : [, R, e, a, l, |, H, o, w, |, T, o]

    // good
    System.out.println(java.util.Arrays.toString(
      testString.split("\\|")
    ));
    // output : [Real, How, To]
  }
}

Answer 5

| is treated as an OR in RegEx. So you need to escape it:

String[] separated = line.split("\\|");

Answer 6

public class StringUtil {

  private static final String HT = "\t";
  private static final String CRLF = "\r\n";

  // This class cannot be instantiated
  private StringUtil() {
  }

  /**
   * Split the string into an array of strings using one of the separator in
   * 'sep'.
   * 
   * @param s
   *            the string to tokenize
   * @param sep
   *            a list of separator to use
   * 
   * @return the array of tokens (an array of size 1 with the original string
   *         if no separator found)
   */
  public static String[] split(final String s, final String sep) {
    // convert a String s to an Array, the elements
    // are delimited by sep
    final Vector<Integer> tokenIndex = new Vector<Integer>(10);
    final int len = s.length();
    int i;

    // Find all characters in string matching one of the separators in 'sep'
    for (i = 0; i < len; i++)
      if (sep.indexOf(s.charAt(i)) != -1)
        tokenIndex.addElement(new Integer(i));

    final int size = tokenIndex.size();
    final String[] elements = new String[size + 1];

    // No separators: return the string as the first element
    if (size == 0)
      elements[0] = s;
    else {
      // Init indexes
      int start = 0;
      int end = (tokenIndex.elementAt(0)).intValue();
      // Get the first token
      elements[0] = s.substring(start, end);

      // Get the mid tokens
      for (i = 1; i < size; i++) {
        // update indexes
        start = (tokenIndex.elementAt(i - 1)).intValue() + 1;
        end = (tokenIndex.elementAt(i)).intValue();
        elements[i] = s.substring(start, end);
      }
      // Get last token
      start = (tokenIndex.elementAt(i - 1)).intValue() + 1;
      elements[i] = (start < s.length()) ? s.substring(start) : "";
    }

    return elements;
  }

}