Replace last occurrence of Character in a String using Java

	// beta
	// Lisence Under GPL2
	// Author: S.Mahbub-Uz-Zaman
	public static String a = "test,test,test";
	public static String replaceWith = " and ";
	// using StringBuffer's replace method
	public static void replaceLastCommaSB () {
	StringBuffer sb = new StringBuffer(a);
	sb.replace(a.lastIndexOf(","), a.lastIndexOf(",") + 1, replaceWith);
	System.out.println(sb);
	}
	output: test,test and test
	// using String's substring method
	public static void replaceLastCommaSS () {
	String temp = a.substring(0, a.lastIndexOf(",")) + replaceWith + a.substring(a.lastIndexOf(",") + 1);
	System.out.println(temp);
	}
	output: test,test and test
	// regular expression [work on progress]
	public static void replaceLastCommaRE () {
	String temp = a.replaceFirst(",", replaceWith);
	System.out.println(temp);
	}
	output: test and test,test

view raw
replace.java
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