Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

Is there a standard way to read in int, long, float, and double values from a string representation?

April 26, 2017double Float int read representation standard String values

0

Posted

Is there a standard way to read in int, long, float, and double values from a string representation?

1 Answer

0

Posted

Ans : There is no one standard way, but there is a small group of methods and constructors that will do the job for you. The java.lang package in the JDK 1.0.2 provides four classes for treating numbers as objects: Integer, Long, Float, and Double. Each of these classes provides constructors and methods that translate from a string to an instance of the class. You then need to invoke an additional Value method to retrieve the numeric value of type held in the numeric object. Alternatively, the Integer and Long classes provide additional parse methods that make the conversion in one step. These techniques are arrayed in Table. Table : Converting from Strings to Numerical Values Target type Code to convert from a String instance (JDK 1.0.2) int new Integer(String).integerValue() Integer.valueOf(String).integerValue() Integer.parseInt(String) long new Long(String).longValue() Long.valueOf(String).longValue() Long.parseLong(String) float new Float(String).floatValue() Fl