Here you can find the source of baseAddress(String email)
static String baseAddress(String email)
//package com.java2s; /*/* w w w . j ava 2 s .c o m*/ * Copyright 2014-2018 Netflix, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { private static final Pattern SUB_ADDRESS = Pattern.compile("^([^+]+)\\+[^@]+(@.*)$"); /** * Return the base address without the detail portion. For example * {@code foo+bar@example.com} would return {@code foo@example.com}. */ static String baseAddress(String email) { Matcher m = SUB_ADDRESS.matcher(email); return m.matches() ? m.group(1) + m.group(2) : email; } }