Syntax error Count how many times the substring appears in the larger String in Java

Count how many times the substring appears in the larger String in Java

Let’s say we have the following string.

String str = "Learning never ends! Learning never stops!";

In the above string, we need to find out how many times the substring “Learning” appears.

For this, loop until the index is not equal to 1 and calculate.

while ((index = str.indexOf(subString, index)) != -1) {
subStrCount++;
index = index + subString.length();
}

The following is an example.

Example

 Live Demo

public class Demo {
   public static void main(String[] args) {
      String str = "Learning never ends! Learning never stops!";
      System.out.println("String: "+str);
      int subStrCount = 0;
      String subString = "Learning";
      int index = 0;
      while ((index = str.indexOf(subString, index)) != -1) {
         subStrCount++;
         index = index + subString.length();
      }
      System.out.println("Substring "+subString+" found "+subStrCount+" times!");
   }
}

Output

String: Learning never ends! Learning never stops!
Substring Learning found 2 times!
Updated on: 2020-06-27T06:45:40+05:30

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