Charat () and codepointat () Examples of common string Methods

1. chatat () -- extract the specified string

2. codepointat () -- extract index character code points

 

Java code

1. /**
2. * Author: Sunshine flavor
3. * Function: charat () and codepointat () common methods of the string class ()
4. * Date: 2010/11/07
5. **/
6. Public ClassStringdemo {
7. Public Static VoidMain (string [] ARGs ){
8. String str1 = "abcdefg ";
9. CharCharacter = str1.charat (0 );
10. System. Out. println ("using charat () method" +
11. "Extract characters from a string. The result is:" + signature );
12. IntCodepoint = 0;
13. For(IntI = 0; I <8; I ++ ){
14. Try{
15. Codepoint = str1.codepointat (I );
16. }Catch(Stringindexoutofboundsexception E1 ){
17. System. Out. println ("index value called by codepointay ()" + I +
18. "The length of the string to be queried is exceeded! ");
19. }Finally{
20. Try{
21. System. Out. println (str1.charat (I)
22. + "Unicode code" + ":" + codepoint );
23. }Catch(Stringindexoutofboundsexception E2 ){
24. System. Out. println ("charat () called index value" + I +
25. "The length of the string to be queried is exceeded! ");
26. }
28. }
29. }
32. }
34. }
35. /* Out:
36. Use the charat () method to extract characters from a string. The result is:.
37. Unicode code of a: 97
38. Unicode code of B: 98
39. C Unicode code: 99
40. D Unicode code: 100
41. The Unicode code of E is: 101
42. Unicode Code of F: 102
43. Unicode code of G: 103
44. The index value 7 called by codepointay () has exceeded the length of the string to be queried!
45. The index value 7 called by charat () has exceeded the length of the string to be queried! */

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