Java common methods of string
public static void main(String[] args) {
// TODO Auto-generated method stub
String aString = "hellocensi @gmail.com " ;
System.out.println(aString);
int lenthString=aString.length();
System.out.println ( "Way1 : " + lenthString); // common methods 1 : Get string length
char str [] = aString.toCharArray () ; // common method 2: is converted into character array
System.out.print("way2：");
System.out.println(str);
for(int i=0;i<aString.length();i++)
System.out.print(str[i]+" ");
System.out.println ( "\ nway3 : " + aString.charAt (. 8)); // common method 3 : The subscript obtaining a single character
Of System.out.print ( "way4 : " + "\ n-"); // common method 4 : programming byte array
byte mybytes[]=aString.getBytes();
for(int i=0;i<mybytes.length;i++)
System.out.print(mybytes[i]+" ");
System.out.print("\n");
for(int i=0;i<mybytes.length;i++)
System.out.print ((char) mybytes [i ]); // byte converted to char
System.out.println ( "\ nway5:") ; // common method 5 : Find a single character
System.out.println(aString.indexOf('@'));
System.out.println (aString.indexOf ( '#') ); // not found return -1
String aString1 = " hello jack";
System.out.println ( "way6:"); // common method 6 : Remove the space in front of the string
System.out.println(aString1);
System.out.println(aString1.trim());
/ * There are common methods are: 7. The interception of a substring from a string : subString ()
8. Case Conversion : the toLowerCase () , the toUpperCase ()
9. Analyzing the beginning and end of the character string : endsWith () , StartWith ()
10. Alternatively a character string : replace ()
...
*/
}
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