JAVA escape characters:
1. octal escape sequence: \ + 1 to 3 digits and 5 digits; range: '\ 000 '~ '\ 100'
\ 0: NULL characters
2. Unicode escape characters: \ u + four hexadecimal numbers; 0 ~ 65535
\ U0000: NULL Character
3. Special characters: Three
\ ": Double quotation marks
\ ': Single quotes
\: Backslash
4. control characters: 5
\ 'Single quotes
\ Backslash character
\ R press ENTER
\ N line feed
\ F go to paper form
\ T horizontal hop
\ B Return
Point escape:. ==> u002E
Escape of dollar signs: $ ==> u0024
Escape of the multiplication Symbol: ^ ==> u005E
Escape from the left braces: {==> u007B
Escape from left square brackets: [==> u005B
Escape of left parentheses :( ==> u0028
Escape of vertical bars: |=> u007C
Escape of right parentheses: ==> u0029
Asterisk escape: * ==> u002A
Escape of the plus sign: + ==> u002B
Escape question mark :? ==> U003F
Escape the backslash: ==> u005C