\t：一个制表位，实现对齐的功能

\n：换行符

\\：一个\

\"：一个"

\'：一个'

\r：一个回车

public class EscapeChar {
  public static void main(String[] args) {
    System.out.println("Beijing\tShanghai\tShenzhen");
    System.out.println("First line\nSecond line");
    System.out.println("D:\\javacode");
    System.out.println("Leo say: \"Java is great!\"");
    System.out.println("Leo say:\'Java is great!\'");
    System.out.println("PHP is best!\rJava");
    System.out.println("PHP is best!\r\nJava");
  }
}