Java Program to convert double type variables to string

Example 1: Java Program to Convert double to string using valueOf()

 class Main { public static void main(String[] args) { // create double variable double num1 = 36.33; double num2 = 99.99; // convert double to string // using valueOf() String str1 = String.valueOf(num1); String str2 = String.valueOf(num2); // print string variables System.out.println(str1); // 36.33 System.out.println(str2); // 99.99 } }

In the above example, we have used the valueOf() method of the String class to convert the double variables into strings.

Note: This is the most preferred way of converting double variables to string in Java.

Example 2: Java Program to Convert double to string using toString()

We can also convert the double variables into strings using the toString() method of the Double class. For example,

 class Main { public static void main(String[] args) { // create double variables double num1 = 4.76; double num2 = 786.56; // convert double to string // using toString() String str1 = Double.toString(num1); String str2 = Double.toString(num2); // print string variables System.out.println(str1); // 4.76 System.out.println(str2); // 786.56 } }

Here, we have used the toString() method of the Double class to convert the double variables into a string.

The Double is a wrapper class in Java. To learn more, visit the Java Wrapper Class.

Example 3: Java Program to Convert double to String using + Operator

 class Main { public static void main(String[] args) { // create double variables double num1 = 347.6D; double num2 = 86.56D; // convert double to string // using + sign String str1 = "" + num1; String str2 = "" + num2; // print string variables System.out.println(str1); // 347.6 System.out.println(str2); // 86.56 } }

Notice the line,

 String str1 = "" + num1;

Here, we are using the string concatenation operation to convert a double variable into the string. To learn more, visit Java String concatenation.

Example 4: Java Program to Convert double to String using format()

 class Main { public static void main(String[] args) { // create a double variable double num = 99.99; // convert double to string using format() String str = String.format("%f", num); System.out.println(str); // 99.990000 } }

Here, we have used the format() method to format the specified double variable into a string. To learn more about formatting string, visit Java String format().