Example usage for java.lang Double parseDouble

Introduction

In this page you can find the example usage for java.lang Double parseDouble.

Prototype

public static double parseDouble(String s) throws NumberFormatException

Source Link

Document

Returns a new double initialized to the value represented by the specified String , as performed by the valueOf method of class Double .

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    double d = Double.parseDouble("123.4e10");
    System.out.println(d);/*from   ww  w  .j  a v  a 2 s  .  c  o  m*/
}

From source file:Main.java

public static void main(String[] args) {
    String str = "50.00001";
    double retval = Double.parseDouble(str);
    System.out.println("Value = " + retval);
}

From source file:Main.java

public static void main(String[] args) {
    String str1 = "123.45";
    try {/*from w  ww.  ja va 2 s.co m*/
        double value1 = Double.parseDouble(str1);
        System.out.println("value1 = " + value1);
    } catch (NumberFormatException e) {
        System.out.println("Error in parsing " + str1);
    }

    String str2 = "8H.9"; // An invalid double
    try {
        double value2 = Double.parseDouble(str2);
        System.out.println("value2 = " + value2);
    } catch (NumberFormatException e) {
        System.out.println("Error in parsing " + str2);
    }

}

From source file:Main.java

public static void main(String[] args) {
    List<String> stringList = Arrays.asList("1.2", "2.2", "3", "4", "5");

    stringList.stream().mapToDouble(n -> Double.parseDouble(n)).filter(n -> n % 2 == 0)
            .forEach(System.out::println);
}

From source file:Main.java

public static void main(String[] args) {
    Stream<String> s = Stream.of("1", "2", "3");

    double o = s.collect(Collectors.summingDouble(n -> Double.parseDouble(n)));

    System.out.println(o);//  w ww.  jav a2 s . c  om
}

From source file:Main.java

public static void main(String[] args) {
    Stream<String> s = Stream.of("1", "2", "3");

    double o = s.collect(Collectors.averagingDouble(n -> Double.parseDouble(n)));

    System.out.println(o);/*from  ww  w  .  ja v a 2  s  . c  o  m*/
}

From source file:Main.java

public static void main(String[] args) {
    Double dObj1 = new Double("100.564");
    System.out.println(dObj1);/* w  w w  .ja va 2  s  . co m*/

    Double dObj2 = Double.valueOf("10.6");

    System.out.println(dObj2);
    double d = Double.parseDouble("76.39");
    System.out.println(d);
}

From source file:Main.java

public static void main(String[] args) {
    List<String> stringList = Arrays.asList("1.2", "2.2", "3", "4", "5");

    stringList.stream().flatMapToDouble(n -> DoubleStream.of(Double.parseDouble(n)))
            .forEach(System.out::println);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String age = "1";
    String height = "1.5";
    String weight = "5.9";

    int theAge = Integer.parseInt(age);
    float theHeight = Float.parseFloat(height);
    double theWeight = Double.parseDouble(weight);

    System.out.println("Age: " + theAge);
    System.out.println("Height: " + theHeight);
    System.out.println("Weight: " + theWeight);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    String input = reader.readLine();

    double number = Double.parseDouble(input);

    System.out.println(input + ":" + Math.sqrt(number));

    reader.close();//  w w  w . ja  v a 2  s  .  c  om
}