Usage of :- int comapareTo(float f)

[Kapil Sachdeva]

Can u please tell me the usage of int compareTo(float f) method defined in java.lang.Float. Please give some code lines.

[Art Metzer]

To compare primitives, you can use less-than and greater-than signs.
To compare the values that the wrapper classes contain, you need to use compareTo().

public class FloatTest {
static Float f1;
static Float f2;
static Float f3;
public static void main( String[] args ) {
f1 = new Float( 4.5 );
f2 = new Float( 8.1 );
f3 = new Float( 8.1 );
System.out.println( "Float " + f1.floatValue() + " compared to Float " +
f2.floatValue() + " = " + f1.compareTo( f2 ) );
System.out.println( "Float " + f2.floatValue() + " compared to Float " +
f1.floatValue() + " = " + f2.compareTo( f1 ) );
System.out.println( "Float " + f2.floatValue() + " compared to Float " +
f3.floatValue()+ " = " + f2.compareTo( f3 ) );
}
}

returns:

Float 4.5 compared to Float 8.1 = -1
Float 8.1 compared to Float 4.5 = 1
Float 8.1 compared to Float 8.1 = 0

HTH
Art

[Manfred Leonhardt]

Hi,
I can give you the example show below.

public class CompareTest
{
  public static void main( String[] args )
  {
    Float f1 = new Float( 0.0f );
    Float f2 = new Float( -0.0f );
    //
    // Use == operator to compare float values.
    //
    if( f1.floatValue() == f2.floatValue() )
    {
      System.out.println( "Values are the same." );
    }
    else
    {
      System.out.println( "Values are not the same." );
    }
    //
    // Use compareTo to compare Float values
    //
    if( f1.compareTo( f2 ) == 0 )
    {
      System.out.println( "Values compare the same." );
    }
    else
    {
      System.out.println( "Values do not compare the same." );
    }
  }
}

The compareTo method is useful when dealing with extremes. That is POSITIVE_INFINITY, NEGATIVE_INFINITY, NAN, +/-0.0f.
Regards,
Manfred.

[Kapil Sachdeva]

Thanks to both of u