Google Guava is a java library with lot of utilities and reusable components. This requires the library guava-10.0.jar to be in classpath. The following example shows using Joiner class. It joins the given strings with provided separator.
package com.bethecoder.tutorials.guava.base_tests; import com.google.common.base.Joiner; public class JoinNullReplaceTest { /** * @param args */ public static void main(String[] args) { Joiner joiner = Joiner.on(":").useForNull("<nil>"); String str = joiner.join("One", null, null, "Two", "Three", null, "Four"); System.out.println(str); } }
One:<nil>:<nil>:Two:Three:<nil>:Four
