1.10 String in java.
String in Java :
0 1 2 3 4 5 6 7 8
-> String Function :
String s1;
s1 = "JavaStudy"; (set of character or array of character.)
s1
0 1 2 3 4 5 6 7 8
j | a | v | a | s | t | u | d | y |
System.out.println('s1'); // 9
Function of String :
eg:
String s1 = 'javastudy';
s1
j | a | v | a | s | t | u | d | y |
1. length() : return number of character present in given string return type is int.
eg :
int x = s1.length();
System.out.println(x);
output : 9
2. charAt(index) : return char present @ specified index position.
eg:
char c1 = s1.charAt(4);
System.out.println(c1);
output : s
3. indexOf(char) : return first occurance position of give char , return type is int.
eg:
int x2 = s1.indexOf(t);
Syste.out.println(x2);
output : 5
4. lastIndexOf(char) : return last occurance position of given char return type int.
eg :
int x3 = s1.lastIndexOf('a');
System.out.println(x3)
output : 3
5. contains(charSeq) : return true if given seq of char is present in string anywhere otherwise return false.
eg :
boolean b1 = s1.contains("stu");
System.out.println(b1);
output : true
6. startsWith(charSeq) : return true if the given string begins with charSeq else return false.
eg:
boolean b2 = s1.startWith("java");
System.out.println(b2);
output : true
7. endsWith(charSeq) : return true if the given String end with charSeq else return false.
eg:
boolean b3 = s1.endsWith("udy");
System.out.println(b3)
output : true
Example Program1 :
class Program1
{
public static void main(String args[])
{
System.out.prinln("Program Started");
String s1 = "javastudy";
System.out.println("given string is ="+s1);
int x1 = s1.length();
System.out.println("total character"+x1);
char c1 = s1.charAt(4);
System.out.println("char @ position 4 is"+c1);
int x2 = s1.indexOf(t);
Syste.out.println("first occurance of t is"+x2);
int x3 = s1.indexOf('t',6);
Syste.out.println("first occurance of t is"+x3);
int x4 = s1.lastIndexOf('a');
System.out.println("last occurance of string "+x4)
System.out.prinln("Program Ended");
}
}
Example Program2 :
class Program2
{
public static void main(String args[])
{
System.out.prinln("Program Started");
String s1 = "javastudy";
System.out.println("given string is ="+s1);
boolean b1= s1.contains("dev");
System.out.println("contains dev ?"+b1);
boolean b2= s1.startsWith("java");
System.out.println("starts with java ?"+b2);
boolean b3= s1.endsWith("per");
Syste.out.println("ends with java ?"+b3);
String s2 = s1.substring(8);
Syste.out.println(s2);
String s3 = s1.substring(4,11);
Syste.out.println(s3);
System.out.prinln("Program Ended");
}
}
for more details follow vide given below:
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