1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.tv.common.util; 18 19 /** Utility class for handling {@link String}. */ 20 public final class StringUtils { 21 StringUtils()22 private StringUtils() {} 23 24 /** Returns compares two strings lexicographically and handles null values quietly. */ compare(String a, String b)25 public static int compare(String a, String b) { 26 if (a == null) { 27 return b == null ? 0 : -1; 28 } 29 if (b == null) { 30 return 1; 31 } 32 return a.compareTo(b); 33 } 34 35 /** Returns {@code s} or {@code ""} if {@code s} is {@code null} */ nullToEmpty(String s)36 public static final String nullToEmpty(String s) { 37 return s == null ? "" : s; 38 } 39 } 40