Friday, 13 April 2018

Search String using index Of Example



  1. /*
      Java Search String using indexOf Example
      This example shows how we can search a word within a String object using
      indexOf method.
    */

    public class SearchStringExample  
    {

      public static void main(String[] args)  
    {
        //declare a String object
        String strOrig = “Hello world Hello World”;

        /*
          To search a particular word in a given string use indexOf method.
          indexOf method. It returns a position index of a word within the string
          if found. Otherwise it returns -1.
        */

        int intIndex = strOrig.indexOf(“Hello”);

        if(intIndex == 1){
          System.out.println(“Hello not found”);
        }else{
          System.out.println(“Found Hello at index “ + intIndex);
        }

        /*
          we can also search a word after particular position using
          indexOf(String word, int position) method.  
        */

        int positionIndex = strOrig.indexOf(“Hello”,11);
        System.out.println(“Index of Hello after 11 is “ + positionIndex);

        /*
          Use lastIndexOf method to search a last occurrence of a word within string.
        */
        int lastIndex = strOrig.lastIndexOf(“Hello”);
        System.out.println(“Last occurrence of Hello is at index “ + lastIndex);

      }
    }

    /*
    Output of the program would be :
    Found Hello at index 0
    Index of Hello after 11 is 12
    Last occurrence of Hello is at index 12
    */

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