Apache Commons Lang 3.0 is a java library with lot of utilities and reusable components. This requires the library commons-lang3-3.0.1.jar to be in classpath. The following example shows using StringUtils.join() API.
package com.bethecoder.tutorials.commons_lang.tests.strings; import org.apache.commons.lang3.StringUtils; public class JoinTest { /** * @param args */ public static void main(String[] args) { System.out.println(StringUtils.join(null)); System.out.println(StringUtils.join(new Object [] {})); System.out.println(StringUtils.join("a", "b", "c", "d")); System.out.println(StringUtils.join("one", "", null, "two")); } }
null abcd onetwo