println方法 - 最后2个字母（l＆n）代表什么？

Question

I guess it's related to println() 's newline functionality ( '\\n' ), but in abbreviated letter-based form, that would be nl rather than ln . Thank you for any comments.

Answer 1

It's historic.

Pascal had write and writeln .

write would output a string, leaving the cursor at the end of that string.

writeln (where ln was short for "line") would write a whole line of text and move the cursor to the start of the next line , typically by automatically appending a CRLF or some other OS-dependent control sequence.

Java inherited the abbreviation, but used print instead of write .

Answer 2

Hi check if this is helpful..

http://docs.oracle.com/javase/7/docs/api/java/io/PrintStream.html

You can find it under the heading Class PrintStream

ln simply means LINE - it prints the character/string in a NEW LINE.

Answer 3

println stands for printline.

There is nothing special about it :P It will print a new line instead of printing it on the same line.

Answer 4

println() method Terminates the current line by writing the line separator string. The line separator string is defined by the system property line.separator, and is not necessarily a single newline character ('\\n').

 public void println() {
     newLine();
 }

Also, there are overloaded methods println(String s) , println(Char c) , println(Double d) , println(Float f) , println(Long l) , println(int i) , println(bool b) .

Here is a link which gives all code.
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/io/PrintStream.java#PrintStream.println%28%29 .

Answer 5

println -> print line.

That means that it will print the line you gave it through the parameter, and goes with the cursor to the next line, waiting for another input.