How to search for a word inside a string ?

Question:

How do you search for a word inside a string?

Answer:

Use the String method indexOf().

Code:

public class FindWord {
 
   public static void main(String[] args) {
 
      String str1 = "The cat in the hat.";
      System.out.println(str1);
 
      // find this word
      String str2 = "cat";
 
      int index = str1.indexOf(str2);
 
      if(index >= 0) {
         System.out.println("The word " + str2 + " found");
         System.out.println("index " + index);
      } else {
         System.out.println(str2 + " not found");
      }
   }
}

Output:

$ java FindWord 
The cat in the hat.
The word cat found
index 4