Java tutorial
//package com.java2s; /* * Copyright (C) 2011 The Android Open Source Project * * 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 android.text.TextUtils; public class Main { /** Concatenates any number of clauses using the specified operation. */ public static String concatenateClausesWithOperation(String operation, String... clauses) { // Nothing to concatenate. if (clauses.length == 1) { return clauses[0]; } StringBuilder builder = new StringBuilder(); for (String clause : clauses) { if (!TextUtils.isEmpty(clause)) { if (builder.length() > 0) { builder.append(" ").append(operation).append(" "); } builder.append("("); builder.append(clause); builder.append(")"); } } return builder.toString(); } }