/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
 
 
	public static void main (String[] args) throws java.lang.Exception
	{
String test = null;
StringBuffer csv = new StringBuffer();
csv.append("test");
csv.append(System.lineSeparator());
csv.append(test);
System.out.println(csv.toString());
System.out.println(Objects.toString(test, ""));
	}
}

LyogcGFja2FnZSB3aGF0ZXZlcjsgLy8gZG9uJ3QgcGxhY2UgcGFja2FnZSBuYW1lISAqLwoKaW1wb3J0IGphdmEudXRpbC4qOwppbXBvcnQgamF2YS5sYW5nLio7CmltcG9ydCBqYXZhLmlvLio7CgovKiBOYW1lIG9mIHRoZSBjbGFzcyBoYXMgdG8gYmUgIk1haW4iIG9ubHkgaWYgdGhlIGNsYXNzIGlzIHB1YmxpYy4gKi8KY2xhc3MgSWRlb25lCnsKCgoJcHVibGljIHN0YXRpYyB2b2lkIG1haW4gKFN0cmluZ1tdIGFyZ3MpIHRocm93cyBqYXZhLmxhbmcuRXhjZXB0aW9uCgl7ClN0cmluZyB0ZXN0ID0gbnVsbDsKU3RyaW5nQnVmZmVyIGNzdiA9IG5ldyBTdHJpbmdCdWZmZXIoKTsKY3N2LmFwcGVuZCgidGVzdCIpOwpjc3YuYXBwZW5kKFN5c3RlbS5saW5lU2VwYXJhdG9yKCkpOwpjc3YuYXBwZW5kKHRlc3QpOwpTeXN0ZW0ub3V0LnByaW50bG4oY3N2LnRvU3RyaW5nKCkpOwpTeXN0ZW0ub3V0LnByaW50bG4oT2JqZWN0cy50b1N0cmluZyh0ZXN0LCAiIikpOwoJfQp9