How to write new line in text file in Java code example

Example 1: java string next line

// its \r\n
String a = "Hello, "
String b = "there!"
System.out.println(a+b);//returns Hello, there
System.out.println(a+"\r\n"+b);//returns Hello, 
//there! //it will be on the next line!

Example 2: how to write between lines in a file in java

RandomAccessFile file = new RandomAccessFile("c:\\data\\file.txt", "rw");

file.write("Hello World".getBytes());

file.close();