printstream.println()的作用是什么？解决方案

printstream.println()的作用是什么？
printstream.println()的作用是什么？

可以从某个端口 写数据吗？

[解决办法]
PrintStream类中的println方法是打印出文本信息
copy自：
http://zhidao.baidu.com/question/51736225.html
[解决办法]
void println() 
Terminates the current line by writing the line separator string. 
 void println(boolean x) 
Prints a boolean and then terminate the line. 
 void println(char x) 
Prints a character and then terminate the line. 
 void println(char[] x) 
Prints an array of characters and then terminate the line. 
 void println(double x) 
Prints a double and then terminate the line. 
 void println(float x) 
Prints a float and then terminate the line. 
 void println(int x) 
Prints an integer and then terminate the line. 
 void println(long x) 
Prints a long and then terminate the line. 
 void println(Object x) 
Prints an Object and then terminate the line. 
 void println(String x) 
Prints a String and then terminate the line.