[Q#7190208][A#7190525] How to read String Builder line by line

https://stackoverflow.com/q/7190208

Can I read String Builder line by line? And Get the length of each line as well. EDIT: "I build string in StringBuilder and add "\n" within. And I need to read it again. I need to consider that every "\n" has a new line."

Answer

https://stackoverflow.com/a/7190525

Given your edit, it's as simple as invoking toString() on the StringBuilder instance, and then invoking split("\n") on the returned String instance. And from there, you'll have a String array that you can loop through to access each "line" of the StringBuilder instance. And of course, invoke length() on each String instance, or "line" to get its length.

APIzation

StringBuilder sb = new StringBuilder();
sb.append("line 1");
sb.append("\\n");
sb.append("line 2");

String[] lines = sb.toString().split("\\n");
for(String s: lines){
    System.out.println("Content = " + s);
    System.out.println("Length = " + s.length());
}

package com.stackoverflow.api;

public class Human7190525 {

  public static String[] getLinesFromStringBuilder(StringBuilder sb) {
    String[] lines = sb.toString().split("\\n");

    return lines;
  }
}

package com.stackoverflow.api;

/**
 * How to read String Builder line by line
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/7190525">https://stackoverflow.com/a/7190525</a>
 */
public class APIzator7190525 {

  public static void readLine(StringBuilder sb) throws Exception {
    String[] lines = sb.toString().split("\\n");
    for (String s : lines) {
      System.out.println("Content = " + s);
      System.out.println("Length = " + s.length());
    }
  }
}