Java String split() method explained | technical-arbaab

Java String split() method explained

It is a predefined function which is present in the Java.lang.String package. It is used to split the string from a specific character or sequence of characters(string) and returns the array of type string let us see in the example to get a more clear idea-

Syntax of split() method

  public String[] split(String regex) {}  

here, regex means regular expression don't confuse at all you just have to give the string as a parameter to this method.

Example 01 of split() method

 public class Split {  
      public static void main(String[] args) {  
           String s="hello";  
            String myarray[]=s.split("e");  
           for(int i=0;i<myarray.length;i++)  
           {  
                System.out.print("element at "+i+" index is "+myarray[i]);  
                System.out.println();  
           }  
      }  
 }  

Output:

 element at 0 index is h  
 element at 1 index is llo  

here, in this example the string hello is split from the character 'e' and the characters before e get stored at the 0th index of the array myarray[] and the characters after 'e'  get stored at the 1th index of the array myarray[]. Or you can also print the array by using only one line from Arrays class as shown below-

 import java.util.Arrays;  
 public class Split {  
      public static void main(String[] args) {  
           String s="hello";  
            String myarray[]=s.split("e");  
           System.out.println(Arrays.toString(myarray));  
      }  
 }  

Output:

 [h, llo]  

here, 'h' is basically stored at 0th index and 'llo' is stored at 1th index of the array.

Example 02 of split() method

 import java.util.Arrays;  
 public class Split {  
      public static void main(String[] args) {  
           String s="hello technical arbaab";  
            String myarray[]=s.split(" ");  
           System.out.println(Arrays.toString(myarray));  
      }  
 }  

Output:

 [hello, technical, arbaab]  

here, in this example the string "hello technical arbaab" is split from every space and the words are stored at different indexes of an array as you have seen that the string representation of an array shows [hello, technical, arbaab] these are the words stored at 0,1 and 2nd index of an array. If you are finding difficulty in understanding this see below example which works same as this but to get a more clear idea what are the values stored in your array at different indexes. 

 import java.util.Arrays;  
 public class Split {  
      public static void main(String[] args) {  
           String s="hello technical arbaab";  
            String myarray[]=s.split(" ");  
           for(int i=0;i<myarray.length;i++)  
           {  
                System.out.println("the value stored at "+i+" index is "+myarray[i]);  
                System.out.println();//for new line  
           }  
      }  
 }  

Output: 

 the value stored at 0 index is hello  
 the value stored at 1 index is technical  
 the value stored at 2 index is arbaab  

Imp.note: here one important thing to note is that the character or sequence of character from which you are going to split, that character or sequence of character is not going to store in the array it becomes the target character or target sequence of character to split your string.