package java_base; import java.util.Arrays; public class StringTest { public static void main(String[] args) { // TODO Auto-generated method stub String s1 = "abc"; String s2 = "abc"; char[] ca = {'a', 'b', 'c'}; String s3 = new String(ca); String s = "0123456789"; String s7 = "ÃÀ¹ú¡¢Öйú¡¢¼ÓÄôó¡¢Ó¢¹ú¡¢µÂ¹ú"; char[] cal = s7.toCharArray(); System.out.println("s.charAt(5) = " + s.charAt(5)); System.out.println("abcdefabcdaaa".indexOf('c')); System.out.println("Let's make things better".replace('e', 'o')); System.out.println("01234567890123456".matches("\\d{17}")); System.out.println("012345ab123456".matches("\\d{17}")); String[] sa = s7.split("[¡¢| , |¡£]"); System.out.println(Arrays.toString(sa)); for(String str:sa) { System.out.println(str); } System.out.println("smiles".substring(1, 5)); } }