This example shows how to convert float to string in Java using valueOf, toString, and + operator. It also shows the best way to convert float to string.
How to convert float to String in Java?
1) Convert float to string using the String class
You can use the valueOf static method of the String class to convert.
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static String valueOf(float f) |
The valueOf method returns a string representation of float argument.
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package com.javacodeexamples.basic; public class FloatToStringExample { public static void main(String[] args){ float f = 532.634f; String strNumber = String.valueOf(f); System.out.println("String value: " + strNumber); } } |
Output
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String value: 532.634 |
2) Using the Float wrapper class
Use the toString method of the Float wrapper class to convert.
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public static String toString(float f) |
This method returns a string representation of the float value passed as a parameter.
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float f = 532.634f; String strNumber = Float.toString(f); System.out.println("String value: " + strNumber); |
Output
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String value: 532.634 |
3) Using string concatenation
String concatenation can be indirectly used to convert any Java primitive values to a string as given below.
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float f = 532.634f; String strNumber = "" + f; System.out.println("String value: " + strNumber); |
Output
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String value: 532.634 |
What is the best way to convert?
The valueOf method of the String class internally calls the toString method of the Float wrapper class to convert. Using either of the methods is equally efficient in terms of performance. The preferred way is to use the toString method of the Float wrapper class.
String concatenation should be avoided mainly for the conversion purpose because,
a) It is difficult to visually understand that the intent of the code statement is to conversion.
b) String concatenation operation creates unnecessary temporary objects during the conversion process. String concatenation is achieved using the append method of the StringBuilder or StringBuffer class. So the code,
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String strNumber = "" + f; |
Will run like,
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StringBuilder sb = new StringBuilder(); sb.append(""); sb.append(f); String strNumber = sb.toString(); |
This example is a part of the Java Basic Examples and Java Type conversion Tutorial.
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