Here you can find the source of toChar(String parameter)
public static char toChar(String parameter) throws Exception
//package com.java2s; /**//from w w w . j a va 2 s .c o m * Copyright (C) 2012 Red Hat, Inc. and/or its affiliates. * * 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. */ public class Main { public static char toChar(String parameter) throws Exception { if (parameter.length() != 1) throw new Exception("Invalid value for a char " + parameter); return parameter.charAt(0); } }