Thursday, 31 March 2016

Java Tutorial : Java String [codePointBefore(int index) method]


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Java Tutorial : Java String [codePointBefore(int index) method]
CodePointBeforeDemo.java
/*
 * public int codePointBefore(int index)
 * 
 * Parameters: 
 * ---------- 
 * index - the index following the code point that
 * should be returned
 * 
 * Returns: 
 * ------- 
 * the Unicode code point value before the given index.
 * 
 * Throws: 
 * ------ 
 * IndexOutOfBoundsException - if the index argument is
 * less than 1 or greater than the length of this
 * string.
 */
public class CodePointBeforeDemo
{

    public static void main(String[] args)
    {
        String str = "JAVA";
        System.out.println("String = " + str);

        // codepoint before index 1 i.e J
        int retval = str.codePointBefore(1);

        // prints character before index1 in string
        System.out.println("Character(unicode point) = " + retval);

    }

}
Output
String = JAVA
Character(unicode point) = 74

Refer: 
https://en.wikipedia.org/wiki/List_of_Unicode_characters
Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringDemo_codePointBefore_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringDemo_codePointBefore_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/12836b6e32056aa84ee5263036ba2429cc0bd845/BasicJava/StringDemo_codePointBefore_App/?at=master
See also:
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  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
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