Explanation of common java string processing methods

Java code

1. /* @ Src http://eric-619.javaeye.com/blog/693636
2. * Common methods in the java. lang. String class: (common methods for String processing)
3. * 1. The parameters are not strict; 2. Strings support regular expressions.
4. *
5. * 1. length ():
6. * Specify the length of a string;
7. *
8. * 2. substring (int begin)
9. * Substring (int beginindex, int endindex)
10. * Substring (). The parameter starts from scratch;
11. *
12. * 3. split (String s1)
13. * Split (String s2, int I)
14. *
15. * 4. startsWith (String s1)
16. * StartsWith (String s2, int I)
17. * EndsWith (String s3)
18. *
19. * 5. replace (String sb, String st)
20. * ReplaceAll (String sb, String st)
21. *
22. */
23. Public ClassTestString {
25. Public Static VoidMain (String [] args ){
26. NewTestString (). testLength ();
27. NewTestString (). testSubstring ();
28. NewTestString (). testSplit ();
29. NewTestString (). testStartsendsWith ();
30. NewTestString (). testReplaceAll ();
31. }
34. // 1. length ():
35. Public VoidTestLength (){
36. String slen = "abc ";
37. String slenn =NewString ("abcdefg ");
38. IntI = slen. length ();
39. IntK = slenn. length ();
40. System. out. println (I );
41. System. out. println (k );
42. System. out. println ("-----------------------------");
43. }
46. // 2. substring (int begin), substring (int beginindex, int endindex)
47. // Note: The number of strings starts from zero.
48. Public VoidTestSubstring (){
49. String se =NewString ("abcdefgh ");
50. String sea = se. substring (3 );
51. String seaa = se. substring (3, 5 );
52. System. out. println (sea );
53. System. out. println (seaa );
54. System. out.