String indexOf (String str) method in Java

The indexOf(String str) method in Java returns the index within this string of the first occurrence of the specified substring.


Let us see the syntax,


Let us see the parameters,

  • str– string


The following is an example of indexOf(String str),


The following is the output,

Java String indexof substring method

String indexOf (int ch, int fromIndex) method in Java
String indexOf(String str, int fromIndex) method in Java
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