Declaring string and assigning value to it
public class main{
public static void main(String[] args){
String str1 = " hello world";
System.out.println(str1);
}
}
Concatination of strings
public class main{
public static void main(String[] args){
String str1 = " hello world";
String str2 = "India";
String str3 = str1+str2;
System.out.println(str3);
}
}
Accessing element from its position
public class main{
public static void main(String[] args){
String str1 = " hello world";
//charAt(pos) is used to access element in string at pos position.
System.out.println(str1.charAt(2));
}
}
Getting substring from string
public class main{
public static void main(String[] args){
String str1 = " hello world";
//substring get substring from a string by accepting starting and ending position.
System.out.println(str1.substring(2,4));
}
}
Using split method
public class main{
public static void main(String[] args){
String str1 = "A,B,C,D";
String str2 = "H I J k";
//will split string by using , as identifier
String [] arr1 = str1.split(",");
// will split string by using space as identifier
String [] arr2 = str2.split(" ");
}
}
String inbuilt methods
public class main{
public static void main(String[] args){
String str1 = " hello world";
// will return length of string
System.out.println(str1.length());
// will convert all char to uppercase
System.out.println(str1.toUpperCase());
//check if string starts with "h"
System.out.println(str1.startsWith("h"));
//check if string ends with "h"
System.out.println(str1.endsWith("h"));
//will find index of "ll"
System.out.println(str1.indexOf("ll"));
// will return index of last occurence if "hello"
System.out.println(str1.lastIndexOf("hello"));
//will replace hello with bye
System.out.println(str1.replace("hello", "bye"));
System.out.println(str1);
System.out.println(Integer.toBinaryString(a));
System.out.println(Integer.toHexString(a));
System.out.println(Integer.parseInt(Integer.toString(a)));
}
}
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