Using Java’s Float class.
float f = Float.parseFloat("25");
String s = Float.toString(25.0f);
To compare it's always better to convert the string to float and compare as two floats. This is because for one float number there are multiple string representations, which are different when compared as strings (e.g. "25" != "25.0" != "25.00" etc.)
Answer from Petar Ivanov on Stack OverflowUsing Java’s Float class.
float f = Float.parseFloat("25");
String s = Float.toString(25.0f);
To compare it's always better to convert the string to float and compare as two floats. This is because for one float number there are multiple string representations, which are different when compared as strings (e.g. "25" != "25.0" != "25.00" etc.)
Float to string - String.valueOf()
float amount=100.00f;
String strAmount=String.valueOf(amount);
// or Float.toString(float)
String to Float - Float.parseFloat()
String strAmount="100.20";
float amount=Float.parseFloat(strAmount)
// or Float.valueOf(string)
How to convert String to a float? I know for new Float( ) or Float.parseFloat( ) or Float.valueOf( ) tricks, but they don't work.
comma or dot when transform float to String. - Processing 2.x and 3.x Forum
Need help converting String to float
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More on reddit.comRyū: fast float-to-string conversion (Java lib, 2018 paper)
Raffaello Giulietti has improved on this and proposed an implementation to JDK, see e.g. https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-February/073954.html. Sadly, it has not yet been integrated as the change is quite complex and not very many people took the challenge to review it. It would help if somebody (or the author) took the original patch and proposed it again in a GitHub PR as the original comes from pre-Github days.
The results are very impressive, though:
More on reddit.comOn my laptop hardware, the speedup factor is 17.7x wrt OpenJDK.
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