<div dir="ltr" style="text-align: left;" trbidi="on"><b>Description:</b></p>
<p> This method has following different variants:</p>
<p></p>
<ul style="text-align: left;">
<li><b>public int indexOf(int ch):</b> Returns the index within this string of the first occurrence of the specified character or -1 if the character does not occur.</li>
</ul>
<p></p>
<ul style="text-align: left;">
<li><b>public int indexOf(int ch, int fromIndex):</b> Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index or -1 if the character does not occur.</li>
</ul>
<p></p>
<ul style="text-align: left;">
<li><b>int indexOf(String str):</b> Returns the index within this string of the first occurrence of the specified substring. If it does not occur as a substring, -1 is returned.</li>
</ul>
<p></p>
<ul style="text-align: left;">
<li><b>int indexOf(String str, int fromIndex): </b>Returns the index within this string of the first occurrence of the specified substring, starting at the specified index. If it does not occur, -1 is returned.</li>
</ul>
<p>
 <b>Syntax:</b></p>
<p> Here is the syntax of this method:</p>
<pre class="highlight" name="code">public int indexOf(int ch )

or

public int indexOf(int ch, int fromIndex)

or

int indexOf(String str)

or

int indexOf(String str, int fromIndex)
</pre>
<p>
<b>Parameters:</b></p>
<p> Here is the detail of parameters:</p>
<p></p>
<ul style="text-align: left;">
<li><b>ch</b> &#8212; a character.</li>
<li><b>fromIndex </b>&#8212; the index to start the search from.</li>
<li><b>str </b>&#8212; a string.</li>
</ul>
<p>
 <b>Return Value:</b></p>
<p> See the description.</p>
<p> <b>Example:</b></p>
<pre class="highlight" name="code">import java.io.*;

public class Test {

 public static void main(String args[]) {
 String Str = new String("Welcome to dineshonjava.com");
 String SubStr1 = new String("Tutorials");
 String SubStr2 = new String("Sutorials");

 System.out.print("Found Index :" );
 System.out.println(Str.indexOf( 'o' ));
 System.out.print("Found Index :" );
 System.out.println(Str.indexOf( 'o', 5 ));
 System.out.print("Found Index :" );
 System.out.println( Str.indexOf( SubStr1 ));
 System.out.print("Found Index :" );
 System.out.println( Str.indexOf( SubStr1, 15 ));
 System.out.print("Found Index :" );
 System.out.println(Str.indexOf( SubStr2 ));
 }
}
</pre>
<p>
This produces following result:</p>
<div style="background-color: #ff99cc;"><b>output:</b> <br />
Found Index :4<br />
Found Index :9<br />
Found Index :-1<br />
Found Index :-1<br />
Found Index :-1</div>
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