Here you can find the source of convertStringToDouble(String valueString)
public static double convertStringToDouble(String valueString)
//package com.java2s; /*/*from w w w. ja va2s. c o m*/ * Copyright 2015-2016 Red Hat, Inc. and/or its affiliates * and other contributors as indicated by the @author tags. * * 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 double convertStringToDouble(String valueString) { double doubleValue; if (valueString.equalsIgnoreCase("NaN")) { doubleValue = Double.NaN; } else if (valueString.equalsIgnoreCase("+Inf")) { doubleValue = Double.POSITIVE_INFINITY; } else if (valueString.equalsIgnoreCase("-Inf")) { doubleValue = Double.NEGATIVE_INFINITY; } else { doubleValue = Double.valueOf(valueString).doubleValue(); } return doubleValue; } }