Thread: string to double

Primitive conversion from String to double can be done using the static method on the Double wrapper class. There are two of them which will parse the string into a either a Double wrapper object or a double primitive.

    String stringDouble = "123.456";
    Double wrapperDouble = Double.valueOf(stringDouble); // This gives you a return type of Double wrapper object
    double primitiveDouble = Double.parseDouble(stringDouble); // This give you a return type of the double primitive

Also note that if you try to parse a string into any number but the string has invalid characters such as "123.4g56" the static method will throw a NumberFormatException.

Exception in thread "main" java.lang.NumberFormatException: For input string: "123.4g56"

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