NumberFormat parse() method in Java with Examples

Last Updated : 01 Apr, 2019

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

// 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

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:

Return Value: The function returns a number parsed from the string. Below is the implementation of the above function: Program 1:

Java

// 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)));
    }
}