Here you can find the source of emptyString()
public static final String emptyString()
//package com.java2s; //License from project: Open Source License public class Main { /**//from w ww . j a v a 2 s. c o m * The empty String (immutable). * * @see #emptyString() */ public static final String EMPTY_STRING = ""; /** * Return an empty String (immutable). * * @return An empty immutable String. * * @see #EMPTY_STRING */ public static final String emptyString() { return EMPTY_STRING; } }