Java How to Split String by New Line

In Java, we can use regex \\r?\\n to split a String by new line.

Different operating system has a different new line

• UNIX or Mac \r
• Windows \r\n

package com.mkyong;
public class SplitByNewLineExample {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder("");
        sb.append("aaa \n");
        sb.append("bbb   \r\n");
        sb.append("ccc\n");
        sb.append("\n");
        sb.append("ddd\r\n");
        sb.append("\r\n");
        sb.append("eee\n");
        String text = sb.toString();
        System.out.println("---Original---");
        System.out.println(text);
        System.out.println("---Split---");
        int count = 1;
        // split by new line
        String[] lines = text.split("\\r?\\n");
        for (String line : lines) {
            System.out.println("line " + count++ + " : " + line);

Output

---Original---
aaa 
bbb   
ccc
ddd
eee
---Split---
line 1 : aaa 
line 2 : bbb   
line 3 : ccc
line 4 : 
line 5 : ddd
line 6 : 
line 7 : eee