NumberFormat parse() method in Java with Examples

1. The parse(str) method is a built-in method of the java.text.NumberFormat which parses text from the beginning of the given string to produce a number. The method may not use the entire text of the given string

   Syntax:

   public Number parse?(String str)

   Parameters: The function accepts a string str whose beginning should be parsed.

   Return Value: The function returns a number parsed from the string.

   Exceptions: The function throws a ParseException if the beginning of the specified string cannot be parsed.

   Below is the implementation of the above function:

   Program 1:

   
   

   
   
   

   // Java program to implement // the above function    import java.text.NumberFormat; import java.util.Locale; import java.text.ParsePosition;    public class Main {     public static void main(String[] args)         throws Exception     {            // Get the number instance         NumberFormat nF             = NumberFormat.getNumberInstance();            // Prints the parsed number or NULL         System.out.println("Number parsed: "                            + nF.parse("567"));     } }
   Output:

   Number parsed: 567
   

2. The parse(str, parseIndex) method is a built-in method of the java.text.NumberFormat which parses a number from the text and returns a Long if possible, otherwise a Double. If IntegerOnly is set, will stop at a decimal point (or equivalent; e.g., for rational numbers “1 2/3”, will stop after the 1).

   Syntax:

   public abstract Number parse(String str, ParsePosition parseIndex)

   Parameters: The function accepts two parameters which are described below:

   • str: specifies the string to be parsed.

   parseIndex: specifies the parse position

Return Value: The function returns a number parsed from the string.

Below is the implementation of the above function:

Program 1:








// Java program to implement // the above function    import java.text.NumberFormat; import java.util.Locale; import java.text.ParsePosition;    public class Main {     public static void main(String[] args)         throws Exception     {            // Get the number instance         NumberFormat nF             = NumberFormat.getNumberInstance();            // Prints the parsed number or NULL         System.out.println("Number parsed: "                            + nF.parse("567",                                       new ParsePosition(1)));     } }
Output:

Number parsed: 67

Reference: https://docs.oracle.com/javase/10/docs/api/java/text/NumberFormat.html#parse(java.lang.String)