floating point issue.Why is it so?

[maria_megha]

Hey all ,
Please run the below program and see the output you get. It gives the output as 1.2 when i change the parameter in the place of 1.2 as 1.1.Similarly it gives 1.4 when i enter 1.3 in place of 1.2. It works for al inputs but when I enter 1.2 it outputs 1.300001. Why is it so?

public class test1 {

	
	public static void main(String[] args) {
	
		float existVersion = Float.parseFloat("1.2");
		float NewVersion = (float) (existVersion + 0.1);
		

		String newVersion=String.valueOf(NewVersion);
		
		System.out.println(newVersion);

	}

}

[EINSTEIN_007]

I guess that it is static because otherwise the JVM would have to instantiate an instance of <MainClass>, and therefore would have to know that MainClass had a default constructor...all to simply get the app started up. Whereas with a static main it knows that MainClass.main(args) should exist, and all it has to do is load the class.