JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to get index of a character or string from another String in java?


Description:

Below method shows how to get index of a specified character or string from the given string. By using indexOf() method you get get the position of the sepcified string or char from the given string. You can also get the index strting from a specified position of the string.


Code:
package com.myjava.string;

public class MyStringIndexOf {

    public static void main(String[] a){
    
        String str = "Use this string for testing this";
        System.out.println("Basic indexOf() example");
        System.out.println("Char 's' at first occurance: "+str.indexOf('s'));
        System.out.println("String \"this\" at first occurance: "+str.indexOf("this"));
        /**
         * Returns the first occurance from specified start index
         */
        System.out.println("First occurance of char 's' from 4th index onwards : "
							+str.indexOf('s',4));
        System.out.println("First occurance of String \"this\" from 6th index onwards: "
							+str.indexOf("this",6));
        
    }
}

Example Output

Basic indexOf() example
Char 's' at first occurance: 1
String "this" at first occurance: 4
First occurance of char 's' from 4th index onwards : 7
First occurance of String "this" from 6th index onwards: 28

Other String Function Examples

Knowledge Centre
Stream and types of Streams
A Stream is an abstraction that either produces or consumes information. There are two types of Streams and they are:

Byte Streams: Provide a convenient means for handling input and output of bytes. Byte Streams classes are defined by using two abstract classes, namely InputStream and OutputStream.

Character Streams: Provide a convenient means for handling input & output of characters. Character Streams classes are defined by using two abstract classes, namely Reader and Writer.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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