Java tutorial
//package com.java2s; /* * Copyright 2012 GitHub 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 android.text.TextUtils; public class Main { /** * Is the given commit SHA-1 valid? * * @param sha * @return true if valid, false otherwise */ public static boolean isValidCommit(final String sha) { return !TextUtils.isEmpty(sha) && sha.matches("[a-fA-F0-9]+"); } }