Java - Integer Class decode() Method

Integer class decode() method: Here, we are going to learn about the decode() method of Integer class with its syntax and example. By Preeti Jain Last updated : March 18, 2024

Integer class decode() method

decode() method is available in java.lang package.
decode() method is used to decode the given String value into an integer value.
decode() method is a static method, it is accessible with the class name too and if we try to access the method with the class object then also we will not get an error.
decode() method may throw a NumberFormatException at the time of decoding a String to an Integer.
NumberFormatException: In this exception, if the given string parameter does not have a parsable integer.

Syntax

public static Integer decode(String str);

Parameters

String str – represents the string to be decoded.

Return Value

The return type of this method is Integer, it returns the Integer holding an integer value represented by the argument of String type.

Example

// Java program to demonstrate the example 
// of decode(String str) method of Integer class

public class DecodeOfIntegerClass {
    public static void main(String[] args) {
        // Variables initialization
        int i = 100;
        String str = "20";

        // Integer object initialized with "int" value
        Integer value1 = new Integer(i);

        // Display value1 result
        System.out.println("value1: " + value1);

        // It returns an Integer object holding the integer value 
        // denoted by the given String argument by calling 
        // value1.decode(str)
        Integer result = value1.decode(str);

        // Display result
        System.out.println("value1.decode(str) :" + result);
    }
}

Output

value1: 100
value1.decode(str) :20

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