Java - Double Class toString() Method

Double class toString() method: Here, we are going to learn about the toString() method of Double class with its syntax and example. By Preeti Jain Last updated : March 23, 2024

Syntax

public String toString();
public static String toString(double value);

Double class toString() method

toString() method is available in Double class of java.lang package.
toString() method is used to get the string value of Double value/object (it is called with "this" object).
toString(double value) method is also used to get the string value of given double value (here, we pass the double value/object as an argument).
Both types of methods do not throw the exception at the time of conversion from Double to String.
Both types of methods are non-static methods, and accessible with the class object only and if we try to access the method with the class name then we will get an error.

Parameters

In the first case: toString(), we don't pass any parameter or value.
In the second case: toString(double value), we pass only one parameter of double type it represents the double value to be converted.

Return Value

In the first case, String – it returns the String representation of this Double object.

In the second case, String – it returns the String representation of the given argument is of double type.

Example

// Java program to demonstrate the example 
// of toString () method of Double class

public class ToStringOfDoubleClass {
    public static void main(String[] args) {
        // Object initialization
        Double ob1 = new Double("10.20");
        Double ob2 = new Double("20.20");

        // Display ob1,ob2 values
        System.out.println("ob1:" + ob1);
        System.out.println("ob2:" + ob2);

        // It represents string of this Double object
        String value1 = ob1.toString();

        // It represents string of the given double parameter
        String value2 = Double.toString(ob2);

        // Display result values
        System.out.println("ob1.toString(): " + value1);
        System.out.println("Double.toString(ob2): " + value2);
    }
}

Output

ob1:10.2
ob2:20.2
ob1.toString(): 10.2
Double.toString(ob2): 20.2

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