Java's string learning record

Java's string learning record

public class Stringdemo {

public static void Main (string[] args) {

Static initialization of strings

String S1 = "Hello china!";

String s3 = "Hello china!";

System.out.println (S1);

Dynamic initialization of strings

String s2 = new String ("Hello China!,china,china");

String S4 = new String ("Hello china!");

String s5 = "Hello Japan";

String s6 = "Hey,"; Hey,hello china!

String s7 = "Beijing | shanghai | nanjing | wuhan | Chengdu";

System.out.println (S1==S3);//true

System.out.println (S2==S4);//false

System.out.println (S2.equals (S4));//true

System.out.println (S1.charat (6));//Get character ' C '

Returns 0:S1==S5, negative s1<s5 positive S1>S5

System.out.println (S1.compareto (S5));

System.out.println (S6.concat (S1));

System.out.println (S6+S1);

System.out.println (S1.contains ("China"));//true

System.out.println (S1.contains ("Japan"));//false

byte[] arr = s1.getbytes ();

System.out.println (S2.indexof ("China"));

System.out.println (S2.lastindexof ("China"));

string[] Citys = S7.split ("\\|");

for (int i=0;i<citys.length;i++)

{

System.out.println (Citys[i]);

}

StringTokenizer st = new StringTokenizer (s7, "|");

System.out.println ("-------------------");

while (St.hasmoreelements ())

{

System.out.println (St.nextelement ());

}

System.out.println (S1.substring (6,s1.length ()-1));

System.out.println (S1.touppercase ());

System.out.println (S3.tolowercase ());

}

}

Java string Learning record